Malicious PDF — malware analysis report

Static analysis result for SHA-256 677a1a71ee60f30f…

MALICIOUS

PDF

40.1 KB Created: 2020-08-12 10:11:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6db3763680166337badc1a34c43f3aff SHA-1: 31cec3146154bcfafee9b1f4715d57d8283a04b9 SHA-256: 677a1a71ee60f30fcae589f41222e27d0815c6026638c46d843924dba87d3a92
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=convert+pdf+to+word+on+ipad+free'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, some pointing to benign Shopify URLs and others to unknown domains. The presence of a 'download button' lure further supports a phishing or redirection attack pattern. No scripts were extracted, but the document's structure and embedded links strongly suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=convert+pdf+to+word+on+ipad+free
    • http://files.tbcwp.org/uploads/1/3/1/8/131871657/2acc866a6414.pdf
    • http://files.deromelab.org/uploads/1/3/0/7/130740490/3168511.pdf
    • http://files.dragonchoirs.net/uploads/1/3/1/3/131380504/nebemebiber-gorik-fiwumoxunubowe.pdf
    • http://zusepew.redwingfirstcov.org/uploads/1/3/2/6/132695329/roneruvogemi-ginemotiseja-jigubi.pdf
    • http://files.wormfoodforthough.net/uploads/1/3/0/9/130969243/e9c22e71c4f8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/22271122494.pdf
    • https://cdn.shopify.com/s/files/1/0437/0553/2569/files/proform_495_pi_treadmill_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/3821/8152/files/65517831118.pdf
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/wimurewaboziviberarewet.pdf
    • https://cdn.shopify.com/s/files/1/0452/1613/7376/files/bunenesipagufugiz.pdf
    • https://cdn.shopify.com/s/files/1/0427/6345/2583/files/born_free_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/blood_meridian_sparknotes.pdf
    • https://cdn.shopify.com/s/files/1/0433/9610/4348/files/sogofumuwokiwa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37872338034.pdf
    • https://cdn.shopify.com/s/files/1/0430/9896/4117/files/4611439638.pdf
    • https://cdn.shopify.com/s/files/1/0434/2900/3416/files/14852171827.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_off000060b7.bin
13067ab8c91f478bdf2f10034ec7059f53ee38a90bf7e993f9f47cceebb104c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60B7 4884 bytes
font_01_sfnt_off00007175.bin
4e1fa81a3b99c9b684edc30e04f00e020c9e2b1ddbd6760eb5837e2a091515c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7175 9932 bytes

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