Malicious PDF — malware analysis report

Static analysis result for SHA-256 727e2c5e3915561e…

MALICIOUS

PDF

42.6 KB Created: 2020-08-19 22:07:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e5fff3844c11720c981301851a93e50 SHA-1: f0f03b731d5eb456ecae68a9678ced6a0ab5b716 SHA-256: 727e2c5e3915561eb7eda32b219bd70cbc914eb97d0a1198a9d39e838c931b2b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is also listed as an IOC. The document also exhibits characteristics of a PDF link farm, with numerous embedded links to Shopify-hosted PDFs. The ML classifier strongly indicates maliciousness, and the overall structure suggests an attempt to redirect users to potentially harmful content or infrastructure.

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=nagin+piano+music+song
    • http://files.bestwordsediting.com/uploads/1/3/2/3/132303010/pibudimarovapob.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/4288/2215/files/34163442342.pdf
    • https://cdn.shopify.com/s/files/1/0429/6353/3977/files/newsletter_template_in_word_format.pdf
    • https://cdn.shopify.com/s/files/1/0431/3835/1255/files/12090237440.pdf
    • https://cdn.shopify.com/s/files/1/0437/9394/0641/files/4458837272.pdf
    • https://cdn.shopify.com/s/files/1/0434/1566/6840/files/mepininado.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53295895336.pdf
    • https://cdn.shopify.com/s/files/1/0435/3500/7893/files/winter_air_conditioning_system_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nanejixiv.pdf
    • https://cdn.shopify.com/s/files/1/0436/4346/9974/files/90102220982.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_off0000586c.bin
5ce511adc925e112bc321f27bff94a92de49140cd209653aee19ea45eb3d0b2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x586C 5096 bytes
font_01_sfnt_off000069b3.bin
3bd60dd0dfbbcf78be672243040190d821435ed66472049fee7cb1485b9dcf40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B3 16316 bytes

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