Malicious PDF — malware analysis report

Static analysis result for SHA-256 6294ee80cec70f26…

MALICIOUS

PDF

46.8 KB Created: 2020-08-11 12:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2f326d376c3cbfcbfc174a409637cc9 SHA-1: 1ac98564e60d3f80bf2a5d32f5c8fe59921fe084 SHA-256: 6294ee80cec70f26b24361b4ed64a1be210de02aea6507a7ce452527ce956016
154 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and a document body that attempts to disguise itself as a magazine preview. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the primary URL leads to known malicious infrastructure, likely to redirect the user to a further malicious site or download. The PDF_SEO_LINK_FARM heuristic suggests a large number of outbound links, many of which are also PDFs, indicating a link farm or content stuffing technique to improve search engine ranking for malicious content. No scripts were extracted from this sample.

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://ttraff.com/pify?keyword=revista+natura+em+pdf+ciclo+18
    • http://files.nicksforzaferrari.net/uploads/1/3/1/3/131379060/9066516.pdf
    • http://files.stmarkschapel.org/uploads/1/3/1/8/131871633/60c4d4e53f8af.pdf
    • http://files.chicagoshares.org/uploads/1/3/0/7/130739789/bujilufusoganin_kodexawabiga.pdf
    • http://mitugil.picsandwics.com/uploads/1/3/2/6/132696212/186126.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/95789865650.pdf
    • https://cdn.shopify.com/s/files/1/0432/3088/8094/files/76170331275.pdf
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/cards_against_humanity_disney_expansion.pdf
    • https://cdn.shopify.com/s/files/1/0434/6255/7856/files/fufosefa.pdf
    • https://cdn.shopify.com/s/files/1/0437/6245/0586/files/2203650432.pdf
    • https://cdn.shopify.com/s/files/1/0438/5721/5648/files/categories_of_life_skills.pdf
    • https://cdn.shopify.com/s/files/1/0427/9736/7452/files/joputokorufojuwam.pdf
    • https://cdn.shopify.com/s/files/1/0433/9374/5046/files/12622917427.pdf
    • https://cdn.shopify.com/s/files/1/0429/6232/1567/files/certificat_de_cession_du_vhicule.pdf
    • https://cdn.shopify.com/s/files/1/0439/4627/9080/files/12567960727.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/napunajatojazadogimawaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/3628/6877/files/58126769476.pdf
    • https://cdn.shopify.com/s/files/1/0434/6334/4294/files/affidavit_of_marriage.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065a9.bin
5e2f2522cbc319d2003ca824d102a6510c7a94c247af2dac2b6698e7949bde51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65A9 5496 bytes
font_01_sfnt_off00007845.bin
ab2bc87683eb91a00b48b4af0a7dd34572511fcaad64bc2767a34dda4f25629b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7845 12612 bytes
font_02_sfnt_off00009e86.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E86 4324 bytes

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