Malicious PDF — malware analysis report

Static analysis result for SHA-256 812d3565bd99283a…

MALICIOUS

PDF

48.3 KB Created: 2020-07-31 05:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c70d68d9b48e0b4fbbde86515a7b7a3 SHA-1: 4067ecc1a76fa446942d6557a261f17e992508fc SHA-256: 812d3565bd99283a32d5235351cb50e667e07585e0d7582d7d51badcba7d72ba
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it's a redirector link to a known malicious domain. Additionally, it features a large number of external PDF links, suggesting a link farm or redirection strategy. The primary malicious URL identified is ttraff.com, which is likely used to funnel users to 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.com/pify?keyword=livre+d+alphabetisation+pdf
    • http://files.settle4mettle.com/uploads/1/3/2/8/132814439/lorowu.pdf
    • http://files.ourhousecallvet.net/uploads/1/3/1/8/131857071/semosi-kimixasobal-baxokuw.pdf
    • http://files.emsteps.com/uploads/1/3/1/6/131637055/dujadebewagif_nokesugij_zegosasera.pdf
    • http://files.bestgardendesign.co.uk/uploads/1/3/1/8/131858592/rujapoxopade.pdf
    • http://files.mylighthouselearning.com/uploads/1/3/1/4/131407227/fojate.pdf
    • http://files.emstep
    • https://cdn.shopify.com/s/files/1/0432/0827/8171/files/19988857300.pdf
    • https://cdn.shopify.com/s/files/1/0435/6725/1617/files/janirukiwuwig.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17673355306.pdf
    • https://cdn.shopify.com/s/files/1/0436/9163/8934/files/nazosotivesifunukevarukig.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/69327158201.pdf
    • https://cdn.shopify.com/s/files/1/0431/0047/1456/files/jixipel.pdf
    • https://cdn.shopify.com/s/files/1/0434/2333/4567/files/kexagesuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/8001/5262/files/15823384250.pdf
    • https://cdn.shopify.com/s/files/1/0428/3550/9415/files/16915868897.pdf
    • https://cdn.shopify.com/s/files/1/0440/1777/8838/files/gojonizelavoteja.pdf
    • https://cdn.shopify.com/s/files/1/0433/8820/7254/files/53869164798.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/mawiguxozi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7641/files/sepimigajubez.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/lisavedidesunaleboro.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c3b.bin
ffc29c468b4ba413412799f788afe9abc2801614a7438f356671c3290c7bcb0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C3B 5060 bytes
font_01_sfnt_off00008d5b.bin
1cc045b2d02b63b858752ca4fe54878fe0cd48d65086c5bdd39047e56468b046		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D5B 11580 bytes

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