Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb7b95c24921d432…

MALICIOUS

PDF

55.8 KB Created: 2020-07-09 22:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: b95ab677b2b94f7459074d4db9f9d5fc SHA-1: c4c84501406480f1ad7a40e771b26c9844b1e778 SHA-256: fb7b95c24921d432cb031efd9e11c60183db1ad79e93bde78bca9e19a3ab65a6
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass of external links, including a redirector link to ttraff.cc, indicating a link farm or redirection attack. The document body, though heavily obfuscated, contains the same lure text as the initial redirector URL, suggesting the primary purpose is to drive traffic to malicious sites. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/wb?keyword=flame%20photometry%20and%20atomic%20absorption%20spectrometry%20pdf In PDF document text
    • http://files.randallcb.com/uploads/1/3/1/6/131606335/duseleje.pdfIn PDF document text
    • http://files.colonelscup.com/uploads/1/3/2/6/132681448/5775508.pdfIn PDF document text
    • http://files.bingocompany.net/uploads/1/3/1/3/131379612/d2857f2095895b.pdfIn PDF document text
    • http://files.stayinginvienna.com/uploads/1/3/0/9/130969154/558974.pdfIn PDF document text
    • http://files.bonneygirlphotography.com/uploads/1/3/2/6/132681204/sapoxorufewodod.pdfIn PDF document text
    • http://files.battambangparish.org/uploads/1/3/2/6/132681002/d767baf407e6.pdfIn PDF document text
    • http://files.amoriandassociates.com/uploads/1/3/0/7/130740573/6964057.pdfIn PDF document text
    • http://files.bbbhoneyfarm.com/uploads/1/3/1/0/131070765/3160390.pdfIn PDF document text
    • http://files.agapeministry.org/uploads/1/3/0/7/130739069/1926322.pdfIn PDF document text
    • http://files.fc-ail-training.com/uploads/1/3/1/8/131871488/ruzarisabaxuguno.pdfIn PDF document text
    • http://files.busybeeorganize.ca/uploads/1/3/0/9/130969004/gojebifazalomo-maxurapokenoxo.pdfIn PDF document text
    • http://files.kspaceonline.com/uploads/1/3/1/3/131380868/b7e90.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ruvirimijoxi.files.wordpress.com/2020/06/35773963179.pdfIn PDF document text
    • https://zaxogetareko.files.wordpress.com/2020/07/rabiratagokiwizixafifot.pdfIn PDF document text
    • https://wesobitid.files.wordpress.com/2020/07/tisiwokeronivip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/muzaloxebomasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dosoxuwananeworatimuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fesulemenakasisot.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D0A 5380 bytes
SHA-256: 730083c1c4fb9a98833498d745f29a19e4970240718f1574d937f7788bc63a03
font_01_sfnt_off0000af2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF2A 10156 bytes
SHA-256: 500eb3a41997ffb77e9a3a9032953d218575fc9179aebfdff108fbcb938f6f3e

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