Malicious PDF — malware analysis report

Static analysis result for SHA-256 73db6ee1dc1e9cc4…

MALICIOUS

PDF

38.9 KB Created: 2020-08-20 19:22:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecc660395c6b83988bbea640944c9a9c SHA-1: 01a27ed9fcc58da3865d57178b7febe5b08eb974 SHA-256: 73db6ee1dc1e9cc49f2e75656168e4ec886160fa44c06461b5925abe848b2636
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a redirector link to 'https://ttraff.com/pify?keyword=beautiful+smile+images'. The document body also contains a large number of URLs, many pointing to Shopify, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the redirector link strongly indicate malicious intent, likely to lead the user to a malicious site or download further payloads.

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=beautiful+smile+images
    • http://files.ursulaadams.com/uploads/1/3/1/4/131407469/pifabe.pdf
    • http://files.chaletmalouin.com/uploads/1/3/1/8/131872110/4531940.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/9522/6523/files/the_replacements_disney.pdf
    • https://cdn.shopify.com/s/files/1/0432/2626/7806/files/bbd_ki_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/8433/2710/files/bsg_watch_order.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30553092986.pdf
    • https://cdn.shopify.com/s/files/1/0436/4769/7049/files/97833689524.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/71684708574.pdf
    • https://cdn.shopify.com/s/files/1/0434/0908/0477/files/70407936030.pdf
    • https://cdn.shopify.com/s/files/1/0429/8797/8905/files/espn_mlb_scoreboard.pdf
    • https://cdn.shopify.com/s/files/1/0435/3903/8360/files/sagelanivunususufutom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39843759369.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/81669760589.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_off00005b9e.bin
810d1dd97da6df9337339594431113aa5ea0b17956839af6940cf8c05b04b88d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9E 5040 bytes
font_01_sfnt_off00006cb6.bin
c7068b490668d2766fdb4516529f3a6e3c2c71951dd7c4b6f28a0ded9d2d67a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB6 10076 bytes