Malicious PDF — malware analysis report

Static analysis result for SHA-256 143e5f67929558e9…

MALICIOUS

PDF

41.0 KB Created: 2020-08-24 05:55:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 455debc303608384b3d9c212639aabb6 SHA-1: f99a25cfdd9a4f12d716ea3806ab1fd675d4daa1 SHA-256: 143e5f67929558e9fc9ce34923a031ed220a6689f713f807c59852e8adbd534a
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised with a keyword related to a business card maker app. This suggests a phishing or malware distribution attempt. The presence of numerous other links, many pointing to Shopify, indicates a potential link farm or SEO manipulation tactic to increase visibility. No scripts were extracted, but the embedded URLs and heuristic firings strongly suggest 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=business+card+maker+app+android+free
    • http://files.fournierfit.com/uploads/1/3/2/7/132740499/lerenufewemol_kodunukura_gabep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/morewu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8306/3715/files/94309147237.pdf
    • https://cdn.shopify.com/s/files/1/0432/7263/4533/files/vuvajojib.pdf
    • https://cdn.shopify.com/s/files/1/0429/5104/9370/files/11991264254.pdf
    • https://cdn.shopify.com/s/files/1/0440/8731/2534/files/mindustry_steam_guide.pdf
    • https://cdn.shopify.com/s/files/1/0439/3343/4011/files/mopadininobikufiz.pdf
    • https://cdn.shopify.com/s/files/1/0437/5488/1185/files/kate_bornstein_gender_outlaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/82619855816.pdf
    • https://cdn.shopify.com/s/files/1/0433/7762/3201/files/compassion_focused_therapy_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/6192/7318/files/44106004967.pdf
    • https://cdn.shopify.com/s/files/1/0434/6124/7138/files/tamedexuwurosi.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_off00006362.bin
52558a400bd97c15e3368ecbd2fbdd09c03606b07acf6349ef38d53f09a4389f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6362 5380 bytes
font_01_sfnt_off00007595.bin
d3a28fba192a92afe3a520f715d1bf687ca62ea90a1bbd0665e64a7115275aaf
pdf-font-stream PDF embedded font (sfnt) at offset 0x7595 9832 bytes