Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc2908314e77aa77…

MALICIOUS

PDF

48.1 KB Created: 2020-10-09 11:51:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1cf93816582ccd13ad652fac8a003222 SHA-1: 6c7f12539e488968357ee1040f1243c6796ba3ca SHA-256: fc2908314e77aa77fe3a6b8bc6bdadd358882e172ccd244f877296f6087658ff
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the one identified by the redirector heuristic. The presence of a large number of external links suggests an attempt to manipulate search engine results or distribute malicious content.

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/pify?keyword=draw+a+man%2527s+face In PDF document text
    • http://josop.kidsneedtorahtoo.com/uploads/1/3/0/7/130776074/soxegazadefip.pdfIn PDF document text
    • http://files.321letshavefun.co.uk/uploads/1/3/1/3/131383398/6c20300e72ac.pdfIn PDF document text
    • http://files.balloon-animal-biz.com/uploads/1/3/0/7/130775288/gotoketiwev_falam_lokedemumubeb_vafip.pdfIn PDF document text
    • http://files.deaquipalmundo.com/uploads/1/3/0/7/130739250/kuwefijavunizafate.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bf6fa47-71ea-479b-abff-ac42543b24c0/42494498794.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b5b8b0b-86f4-4000-82c6-316b8265ab7b/744515732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f2dd8e6-86e0-4e79-86d1-6e37237ea16a/sozobevisatulavotuva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/317956d7-c95f-4bcc-b002-d3b7703d33d5/62637842631.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62107916-589f-4fcc-84a5-851e6ec010af/22796970867.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/6910/0198/files/nifuxuwubuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3366/4922/files/xunovuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9238/8261/files/minna_no_nihongo_n4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1375/7339/files/3526102090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5bca6ab-e0a4-43c1-ad34-92c4da0e567d/16727195475.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/098e15d3-ea8d-4ab9-99a3-c8e9ab5c7927/xozufofulegitiviwazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82ff905b-40df-47a9-9ef7-a11c16af8d54/21897884617.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/806160a9-fb3f-4f43-b69a-88732791e85e/nilarezujexalikujinokipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/332b7ee3-9b54-40e0-91e9-883a6e49bb8a/zopixatadeku.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_off00007ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF7 5120 bytes
SHA-256: 2dd44e6c4d7a7c165fdeaef484e31f2ddc0c1d75e0f38175dcd4e82ee2b32964
font_01_sfnt_off0000916a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x916A 9892 bytes
SHA-256: c8c2595fccda30c35ee539010cde207463b10467126ef5341963f44eb4e3b510

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