Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f2a9bde39dadf64…

MALICIOUS

PDF

41.1 KB Created: 2020-08-13 22:08:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b36834713177030c20acc5961da6b84 SHA-1: c5e61ae959daa7441f48effb4ef602e61b3858e8 SHA-256: 0f2a9bde39dadf64f3818cd05bd0392be1602a3a8bb0f4dc897218f93a171a21
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector, and another flagged the document as a link farm. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users to click these links, which could lead to phishing pages or the download of further 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://ttraff.cc/pify?keyword=pathfinder+pawns+bestiary+box+4+pdf
    • http://files.hobsonshomemade.com/uploads/1/3/2/7/132740352/figitezugonasome.pdf
    • http://vezob.mmsoundandlighting.com/uploads/1/3/1/4/131437736/rebusuzogodejuxifo.pdf
    • http://files.a2arnett.com/uploads/1/3/0/7/130776208/dediwuwinum.pdf
    • http://fufite.youarentaloneproject.com/uploads/1/3/0/8/130874134/8536730.pdf
    • http://files.cimatoville.com/uploads/1/3/1/4/131437513/numobek.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/nuvokumulogimejune.pdf
    • https://cdn.shopify.com/s/files/1/0432/4861/5579/files/42157635113.pdf
    • https://cdn.shopify.com/s/files/1/0429/8889/6415/files/71977699658.pdf
    • https://cdn.shopify.com/s/files/1/0431/6427/0743/files/63317414299.pdf
    • https://cdn.shopify.com/s/files/1/0435/0866/2440/files/90450484335.pdf
    • https://cdn.shopify.com/s/files/1/0433/0291/2168/files/zowefojututuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/53749718037.pdf
    • https://cdn.shopify.com/s/files/1/0429/1801/9235/files/rc_plane_plans_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/dapawitexenakukaboderotum.pdf
    • https://cdn.shopify.com/s/files/1/0431/0571/4338/files/lifijogireziteki.pdf
    • https://cdn.shopify.com/s/files/1/0427/5562/1031/files/wusimipelar.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/dowexifesazedora.pdf
    • https://cdn.shopify.com/s/files/1/0435/5280/0929/files/livro_epidemiologia_teoria_e_prtica.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006195.bin
c56fd6373c09a2e1f6e8b65490faf1d38f37c903bc3626d7b9a4bc6b626ca605		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6195 5588 bytes
font_01_sfnt_off0000749b.bin
b8ce23b924c097b2b4886963e0292d35b588feb4fe92c12b6feeea966bf8111a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x749B 10200 bytes

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