Malicious PDF — malware analysis report

Static analysis result for SHA-256 6713deea4692c162…

MALICIOUS

PDF

74.9 KB Created: 2020-10-28 01:46:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ae03ddd45ab48b3427c0335ad835e65d SHA-1: b4eb134db304b3a1ac9489a499db9fdb25c7e385 SHA-256: 6713deea4692c162848abcacb6e87d2b17a4491f34901e0e3152da987acbfe34
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a significant number of embedded links, identified as a link farm. One critical heuristic indicates these links point to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of this malicious infrastructure. No scripts were extracted, but the presence of numerous links suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.me/123?keyword=orchid+potting+mix+amazon In PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/9838750.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/dokafopenivoziduf.pdfIn PDF document text
    • https://vunisanelebori.weebly.com/uploads/1/3/3/9/133999195/volowetogewirov.pdfIn PDF document text
    • https://jimoporifu.weebly.com/uploads/1/3/4/3/134378689/tosarurexuwukugema.pdfIn PDF document text
    • https://nopiroradonumiw.weebly.com/uploads/1/3/4/4/134401961/kataxutenifaxow.pdfIn PDF document text
    • https://rizadubarezesul.weebly.com/uploads/1/3/4/4/134499036/jediju.pdfIn PDF document text
    • https://buluzuzumaz.weebly.com/uploads/1/3/1/6/131636727/migifirugolojos.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/c2164b4c5d1c8.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/3222a74.pdfIn PDF document text
    • https://sipasegeremiraf.weebly.com/uploads/1/3/4/4/134404187/fufesazujubofigez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372378/normal_5f8c0a132dfea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369647/normal_5f880e16c7d7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371258/normal_5f8bb98dd1c85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374859/normal_5f8bf8b271739.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378157/normal_5f927e1acadd1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tiduro/berg_balance_scale_francais.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/software_testing_and_quality_assurance_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bc52a6c-236e-4bb2-9b7c-3bbbe4a2e992/laws_of_motion_worksheet_middle_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31f1911c-9eec-4590-bdc5-f655fe090056/char_broil_assembly_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/214b60b1-ec7a-4635-88f1-eef78fe79693/hz_mer_dizisi_trke_altyazl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/405e4114-5bf8-4429-8f86-47656fcc4526/46064909851.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1812231-fc97-4ef0-b498-fe5f7825a8ca/pazegofozi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0433/8077/files/66535438918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2536/6165/files/jedubitipuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4437/0070/files/tolaxidarawojodabupiwuw.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE542 5424 bytes
SHA-256: 2ddb55557e92ffa3210d9a45c09f05d0c7a27b4b025bba93c152abc7197bfc97
font_01_sfnt_off0000f791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF791 11776 bytes
SHA-256: 60215ef170f66d6da53e6cb688397c4b801ca723499dd422c17ceea63d36426e

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