Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f59ca831b0a41ce…

MALICIOUS

PDF

35.9 KB Created: 2020-08-05 08:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 578b9db46d13f558fe714a1a0433fe3a SHA-1: 2477cd45fb6b1bed9d6c7f8fa3e598bc394449df SHA-256: 5f59ca831b0a41ce1cbc695718f25c39b2913cbc379d8646b7421eba34e32ccb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service designed to obscure the final destination. The primary redirector URL, https://ttraff.com/pify?keyword=simple+past+tense+and+present+perfect+tense+exercises+pdf, is flagged as malicious. This suggests the document is part of a link farm or SEO manipulation scheme to drive traffic to malicious sites, likely for phishing or malware distribution.

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=simple+past+tense+and+present+perfect+tense+exercises+pdf
    • http://files.lydiazervanos.com/uploads/1/3/2/6/132681536/e1046.pdf
    • http://numepesub.bartjk.nl/uploads/1/3/2/6/132681504/4413479.pdf
    • http://files.lephoartgallery.com/uploads/1/3/0/7/130740163/rarazubumonabebal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1854/1480/files/cants_5_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/6239/4008/files/29131200358.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/jujepisinukelafaxikixelub.pdf
    • https://cdn.shopify.com/s/files/1/0430/7301/1863/files/pvc_ceiling_panels_installation.pdf
    • https://cdn.shopify.com/s/files/1/0435/7190/4673/files/4278305199.pdf
    • https://cdn.shopify.com/s/files/1/0434/6681/7689/files/79367546809.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/19713689982.pdf
    • https://cdn.shopify.com/s/files/1/0429/1585/6550/files/38624843610.pdf
    • https://cdn.shopify.com/s/files/1/0432/8361/1801/files/92097711353.pdf
    • https://cdn.shopify.com/s/files/1/0429/2725/9811/files/fesotobu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0015/8629/files/swag_code_generator.pdf
    • https://cdn.shopify.com/s/files/1/0437/9282/6517/files/gipuxek.pdf
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/47549781570.pdf
    • https://cdn.shopify.com/s/files/1/0434/2477/6354/files/nabob.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_off00004e4d.bin
0d046f66dffebdc4191e630cef4c326cb1bca792051df35f89e0e15a59c0ab72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E4D 5472 bytes
font_01_sfnt_off000060d3.bin
9966bd32ed3792cb1f092a2b499d321d5733ee7e000419668881bfd136f90cb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60D3 9716 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.