Malicious PDF — malware analysis report

Static analysis result for SHA-256 120f6862f4ed0aed…

MALICIOUS

PDF

40.8 KB Created: 2020-08-31 01:41:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65954e9886830723f9202633fe2cb746 SHA-1: f65cdc5a626525e8587662b391b7431a0ecb84f5 SHA-256: 120f6862f4ed0aed90775c1fd7e3f5210f9ddf597148efa65759b889fb0aa201
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one pointing to known malicious redirector infrastructure at `https://ttraff.cc/wix?keyword=hacer+una+encuesta+en+google`. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=hacer+una+encuesta+en+google
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3705/6414/files/68461377917.pdf
    • https://cdn.shopify.com/s/files/1/0438/3080/4642/files/pajovenagoxapetowux.pdf
    • https://cdn.shopify.com/s/files/1/0427/8219/5879/files/larissa_90_day_fiance_police_report.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/21434610378.pdf
    • https://cdn.shopify.com/s/files/1/0427/4687/1974/files/85767645822.pdf
    • https://static.usrfiles.com/ugd/67e251_4948c1d71c1e4bf4b276c0c17f65e932.pdf
    • https://static.usrfiles.com/ugd/2c8d66_8b44a7bdd7bf48848f7abf72ab8e5121.pdf
    • https://cdn.shopify.com/s/files/1/0436/3301/6982/files/femoru.pdf
    • https://cdn.shopify.com/s/files/1/0437/8840/2839/files/6312300674.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/appareil_gnital_masculin_et_fminin.pdf
    • https://cdn.shopify.com/s/files/1/0433/7483/7925/files/basics_physics_formulas.pdf
    • https://static.usrfiles.com/ugd/314c35_87fdcc2bb58f4cb882375c9777b92158.pdf
    • https://static.usrfiles.com/ugd/89064d_ea955ce6b30d4980b0c155e0c49bb0bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_298ee1e7a83942a7a0095428a4252210.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_off000060a1.bin
70a62c207ec9660663b1d85de7d317c23f16693c36b6abf1a21a8a8cb6ad3867
pdf-font-stream PDF embedded font (sfnt) at offset 0x60A1 4928 bytes
font_01_sfnt_off0000716e.bin
49d75e5a1df18b58e9deff7c75c0fe60cb6451a5a7a57b0d2fb25149007394e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x716E 10932 bytes