Malicious PDF — malware analysis report

Static analysis result for SHA-256 0529428baab4a905…

MALICIOUS

PDF

48.9 KB Created: 2020-10-31 03:46:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: b5930fc4eb385b091ff468b0363c7533 SHA-1: 11f2b192975e066e11f93fde681decf4be29ffc9 SHA-256: 0529428baab4a9055e7508fcf46e4b477abbf3e43dce65760b56aa0471c0453c
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The embedded URL 'https://ggtraff.ru/aws?keyword=2003+ap+biology+free+response+scoring+guidelines' is the primary indicator of malicious intent, likely serving as a lure for further malicious activity. The document body, though heavily obfuscated, contains this URL, suggesting an attempt to disguise its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ggtraff.ru/aws?keyword=2003+ap+biology+free+response+scoring+guidelines In PDF document text
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/4010f08d.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/40ddfa4d7f4e3e.pdfIn PDF document text
    • https://nanorobudilason.weebly.com/uploads/1/3/0/7/130775181/jilejobelado.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/3db5f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c33a7e96-a158-40f8-a431-c431faf401ae/33249729922.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a18f4b0-0819-435d-b6b7-097b51f59472/moralobekuzubekidi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8418/3220/files/objectives_of_inflation_accounting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab8e889b-7945-4600-a91e-5f5d46ad0c23/96982189975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f80084c6-3bbf-40da-b9e7-c467834859b9/fomogudap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6460/5853/files/road_bike_crankset_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/uva_in_valencia_courses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5722/4129/files/nudigibul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/2166/9816/files/naming_binary_covalent_molecules_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/4849/0915/files/stadtwerke_mnster_app_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d0344d8-59fc-4b85-8ee2-ae8889374941/86532136230.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E78 5708 bytes
SHA-256: f720669e84173447e85d294a8a8c05c2a558950c067e72518825535d91d8f2b8
font_01_sfnt_off000081d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81D4 10800 bytes
SHA-256: 97fe090f2fbf5c262a2faa566952f688486263c3afe875a17a92953db83403af
font_02_sfnt_off0000a624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA624 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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