Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dc5ee3c29ec7e0f…

MALICIOUS

PDF

42.1 KB Created: 2020-08-24 01:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69e6fc8e2ab1683a4ecb3c17defdced6 SHA-1: fbbf95d89e243eaa2d0ef70368cf054ba8fc3a87 SHA-256: 6dc5ee3c29ec7e0f29e6d4e337ebe7c4354a47c0ac30890b66fb94e2d62864b4
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to external resources, indicating a link farm or redirection strategy. One prominent URL, https://ttraff.com/pify?keyword=block+websites+firefox+android, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify links, suggesting a lure to a malicious site. The ML classifier also strongly flagged this PDF 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.com/pify?keyword=block+websites+firefox+android
    • http://nesuto.thesanctuaryatdennypark.org/uploads/1/3/1/4/131452861/fokexasimixakori.pdf
    • http://vaker.cornermsband.com/uploads/1/3/1/6/131607600/bibivijenal.pdf
    • http://files.capecodacoustics.com/uploads/1/3/0/8/130814676/5956700.pdf
    • http://files.laurenmpost.com/uploads/1/3/1/4/131438464/9583946.pdf
    • http://loduva.gavinwelshfarriery.co.nz/uploads/1/3/0/8/130813831/775804.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7692/7142/files/mathematical_modelling_in_systems_biology.pdf
    • https://cdn.shopify.com/s/files/1/0436/1846/7997/files/duxojegemexovoxa.pdf
    • https://cdn.shopify.com/s/files/1/0436/4930/2693/files/sujotodotugeliwepek.pdf
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/57178996758.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3415/files/blackberry_classic_2019_android.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3794/files/thariqah_alawiyah.pdf
    • https://cdn.shopify.com/s/files/1/0437/6982/3390/files/68956137496.pdf
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/define_absenteeism.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6344/files/29747675365.pdf
    • https://cdn.shopify.com/s/files/1/0431/9923/4203/files/78515041677.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_off0000668f.bin
bada8f8a33a2d5d38a53ad0afcc9245fe35d7fb1279324148c9d60ce3c856286		 pdf-font-stream PDF embedded font (sfnt) at offset 0x668F 5428 bytes
font_01_sfnt_off0000791b.bin
c1b784d98af484f1bb4cb65a7151c1f9e5229458bca4a44ebdf46d70d53b2fd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x791B 10080 bytes

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