Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a63faa44b314e74…

MALICIOUS

PDF

37.6 KB Created: 2020-08-14 04:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 973e9e7bd2cfce73b9fe2fc9908a03c8 SHA-1: 30bbc114d2edf37ed963fc4506e327097b923746 SHA-256: 5a63faa44b314e742ead9044fe00fc2780e107fcc0ad7f4c6968b3a37a36129f
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.com/pify?keyword=bing+maps+3d+deutsch'. The document body and embedded links suggest a link farm or SEO manipulation tactic to drive traffic to potentially malicious sites. The ML classifier also strongly indicated maliciousness.

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=bing+maps+3d+deutsch
    • http://files.my-mediamatters.tech/uploads/1/3/1/3/131398547/2800a404.pdf
    • http://files.chatinfrench.com/uploads/1/3/1/0/131070231/754114.pdf
    • http://pijodiva.stepharchers.co.uk/uploads/1/3/0/8/130874379/norejazufomaresuf.pdf
    • http://files.cafeessencebendigo.com/uploads/1/3/1/8/131857650/gepuzujexuxaweb-wasesatapibajun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/7002/9975/files/jiruzigajolaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/8133/4933/files/nozovodeza.pdf
    • https://cdn.shopify.com/s/files/1/0434/2022/1607/files/xadatikemi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/karozikoxuruxovegixowur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98223768302.pdf
    • https://cdn.shopify.com/s/files/1/0431/8206/3777/files/rugojigilegiwoli.pdf
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/luropepolobilejazaxavidor.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/bare_necessities_piano.pdf
    • https://cdn.shopify.com/s/files/1/0431/0840/1316/files/92760518474.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13652925252.pdf
    • https://cdn.shopify.com/s/files/1/0429/1215/3766/files/77092747200.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/xarajezivanujebuwigamotul.pdf
    • https://cdn.shopify.com/s/files/1/0430/6688/4250/files/adelbert_von_chamisso_la_maravillosa_historia_de_peter_schlemihl.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_off0000479a.bin
3577ce2862273ada0414dbae3ce90b14d3901dc916844e550f8b169be1f69d31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x479A 5344 bytes
font_01_sfnt_off00005991.bin
67757ef5fc19816854d7792092a52fa2ed3dda40b56e35b836b1ecdb97133f41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5991 10080 bytes
font_02_sfnt_off00007bd8.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD8 4324 bytes

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