Malicious PDF — malware analysis report

Static analysis result for SHA-256 1619ff70bb1661e3…

MALICIOUS

PDF

39.4 KB Created: 2020-08-08 16:41:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d66b0de3f83fb30f3f5b86d099269bc SHA-1: d278af2125817412b0337c359bc6404036f168cc SHA-256: 1619ff70bb1661e3b460dc6ac6e47588a30cd0563bb730aeec5aabe63f14ee0c
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'bizerba slicer parts' and includes the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of many external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

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.ru/pify?keyword=bizerba+slicer+parts+pdf
    • http://valipotak.gotnlc.com/uploads/1/3/1/4/131437987/4638adf5.pdf
    • http://files.thefilamentstudio.com/uploads/1/3/0/7/130739769/wapuwivegub.pdf
    • http://baxiluw.engagementlearningpress.com/uploads/1/3/1/3/131383297/28fb051.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7205/2643/files/postgresql_command_line_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/8215/3112/files/jasokevajebuviwodixemu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8991/0165/files/19326247898.pdf
    • https://cdn.shopify.com/s/files/1/0431/5113/0785/files/articulos_sobre_cancer_de_prostata.pdf
    • https://cdn.shopify.com/s/files/1/0428/3406/7615/files/mekege.pdf
    • https://cdn.shopify.com/s/files/1/0433/0323/9835/files/viwufedabepijukefuruke.pdf
    • https://cdn.shopify.com/s/files/1/0430/3237/9545/files/vabunerapuj.pdf
    • https://cdn.shopify.com/s/files/1/0436/3495/0304/files/powelomijujozomakediza.pdf
    • https://cdn.shopify.com/s/files/1/0431/9592/4637/files/futewekevunobikesonojow.pdf
    • https://cdn.shopify.com/s/files/1/0428/3020/0991/files/74888874760.pdf
    • https://cdn.shopify.com/s/files/1/0432/3485/3021/files/19175698670.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3142/files/lionel_zw_transformer_repair.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/faxetapibifetixoju.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2255/files/nature_and_scope_of_business_finance.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_off0000514f.bin
38bbd420562910276ad33a759f3be0ae37b716da81aa10a3916187b2f10c9f85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x514F 5388 bytes
font_01_sfnt_off000063b5.bin
7941020767bf6b89e2607a8fab3091ed434de4ec2873797d8e828fac7a049fcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63B5 13580 bytes

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