Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddb62f5b50b58ebe…

MALICIOUS

PDF

43.2 KB Created: 2020-08-11 20:55:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6f83a0d0b8f9b86724fa2e84d737bd2 SHA-1: 13eafae1f8fa88727027570a31674446e3e75e2d SHA-256: ddb62f5b50b58ebe6d0c45c1c32900fefd4f322295dc523f328353b6ebe9d268
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document was flagged as malicious by a machine learning classifier and contains multiple embedded links. One critical heuristic identified a malicious redirector link to 'ttraff.com', indicating a likely phishing or malware distribution attempt. The document body, though heavily obfuscated, also contains this URL and numerous other links pointing to Shopify domains, suggesting a link farm strategy to obscure the ultimate malicious destination. 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=el+cantico+de+las+criaturas+pdf
    • http://files.stillmemoryphotography.com/uploads/1/3/1/3/131380146/c655dcdaa0bf9.pdf
    • http://files.yconnyi.org/uploads/1/3/1/6/131606638/7aaaea07b04f4a.pdf
    • http://lowetum.mrsgarritysroom003.com/uploads/1/3/1/1/131163635/2126441.pdf
    • http://wedefuja.tempestuous.ca/uploads/1/3/0/7/130739919/rakeroman-xafegoror-doxupaxad.pdf
    • http://files.calvarybaptist.co.uk/uploads/1/3/0/7/130739693/fizagexifutet.pdf
    • https://cdn.shopify.com/s/files/1/0435/8173/5073/files/election_commission_of_maharashtra_voter_list.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/1830982191.pdf
    • https://cdn.shopify.com/s/files/1/0433/5563/5871/files/carlos_drummond_de_andrade_livros_em.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/dutale.pdf
    • https://cdn.shopify.com/s/files/1/0433/0340/3678/files/afoqt_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0448/0391/5933/files/the_cask_of_amontillado_literature.pdf
    • https://cdn.shopify.com/s/files/1/0438/5318/5174/files/kejatorobojexixazujilu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55079075607.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/sagabaxinepebexofoxokuxin.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7913/files/65372921695.pdf
    • https://cdn.shopify.com/s/files/1/0427/4061/3286/files/90351785121.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_off0000686e.bin
f2c741a0d662351c022c492f12581397ac23e0e4933710a3b852d12d08ea8ee1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x686E 5108 bytes
font_01_sfnt_off000079d0.bin
1d44a7dd747b663fec482346e47fe6e0bcbf925243d120034cc76c468a1caaec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79D0 11136 bytes

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