Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d0bc6b928c629b…

MALICIOUS

PDF

45.8 KB Created: 2020-07-28 08:56:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6e85f8c97643db5f7606dc07a6e1be8 SHA-1: 838fa23142c9b90cc809067a3178b8b9e14c0ae1 SHA-256: 14d0bc6b928c629bf92bb8def39cb2d9807dbd8b5e801c58357cfbf5004acfa3
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.cc), indicating a phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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=sql+server+2016+express++free
    • http://files.thewarptheweft.com/uploads/1/3/1/4/131454355/xukapaduxa.pdf
    • http://files.noahsthompson.com/uploads/1/3/1/8/131856065/redesokuwabajo_wedisav_siwuxiv_refofibije.pdf
    • http://files.positivitymagic.com/uploads/1/3/0/7/130738603/37b64e.pdf
    • http://files.varsitycolorsgreek.com/uploads/1/3/1/3/131381540/9280678.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0965/4432/files/69505786548.pdf
    • https://cdn.shopify.com/s/files/1/0432/2630/0577/files/jutuvolo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9300/7272/files/jopariguk.pdf
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/netufudiwuxirusavewerazan.pdf
    • https://cdn.shopify.com/s/files/1/0432/4183/2615/files/98417802696.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/luvexopunevo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84770620138.pdf
    • https://cdn.shopify.com/s/files/1/0434/6085/3912/files/najemajozuninajebikig.pdf
    • https://cdn.shopify.com/s/files/1/0434/0852/3416/files/23521597922.pdf
    • https://cdn.shopify.com/s/files/1/0428/4760/0807/files/gewobalejasevimesefowajo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/11143430166.pdf
    • https://cdn.shopify.com/s/files/1/0440/9245/7112/files/suxapajavu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/pugewumove.pdf
    • https://cdn.shopify.com/s/files/1/0433/0265/0014/files/sixetebavem.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_off00006fa8.bin
a43ec93759155edd2004ad0a0ae461829ce43e70f8665f6fc7d145ae872ce268		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA8 4968 bytes
font_01_sfnt_off000080a3.bin
8e0907ccffc045f52bc55912dc7bfa30abc4d84b2430bf09bcb79898bb24d6e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80A3 13360 bytes

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