Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eda48604af44f2a…

MALICIOUS

PDF

48.8 KB Created: 2020-08-09 18:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f36283b1f1c0218376f892b7f3a59aef SHA-1: df50c23aa2b2106d7c7d8a7d4729817d6b7fa927 SHA-256: 6eda48604af44f2a260f4353cf35946fbe6d6490ad6c7c632778c4cf8f5713ac
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 Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One prominent link directs to a known malicious redirector infrastructure, indicating a probable attempt to lead users to harmful content. The ML classifier also strongly flagged this document as malicious.

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=light+intensity+definition+pdf
    • http://files.smartrecruitment.com/uploads/1/3/1/6/131606231/1025580.pdf
    • http://files.womensfundofep.org/uploads/1/3/1/6/131606186/6778030.pdf
    • http://files.madkentadventure.com/uploads/1/3/1/3/131398406/tupuvufidimeka.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/8933/0325/files/jasefutefap.pdf
    • https://cdn.shopify.com/s/files/1/0438/5406/9925/files/aadhaar_data_update_form_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7546/0517/files/89000620728.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/42465708556.pdf
    • https://cdn.shopify.com/s/files/1/0438/0993/1426/files/pobikivisugabipudozosolef.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/pogiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/7433/8472/files/kanunadadizikekodad.pdf
    • https://cdn.shopify.com/s/files/1/0437/7447/6440/files/podasoku.pdf
    • https://cdn.shopify.com/s/files/1/0431/8747/0499/files/6194226807.pdf
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/givirokinumegogem.pdf
    • https://cdn.shopify.com/s/files/1/0435/8271/8107/files/35096024300.pdf
    • https://cdn.shopify.com/s/files/1/0429/1044/9830/files/37748068152.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e7c.bin
41fde96173ddb20d659dbadd93651bd588ef9942a77fadac725b7c371f64b3f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7C 4796 bytes
font_01_sfnt_off00006edc.bin
0e9c54decb3ed7ff042a41eadb038d8256846992a2d33cc78e54d817a844fa9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EDC 10784 bytes
font_02_sfnt_off00009375.bin
c43c81af3addadc619f1b50b0eb79006c69e58cb90abf43f7a5fbd940e22698c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9375 16060 bytes
font_03_sfnt_off0000a809.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA809 4324 bytes

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