Malicious PDF — malware analysis report

Static analysis result for SHA-256 726c24595e49c882…

MALICIOUS

PDF

63.3 KB Created: 2020-08-25 04:30:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5be5e8232103d0175a34994f47971f8f SHA-1: f4b6be833ef1a8a520b0ac714db25599ac9a7707 SHA-256: 726c24595e49c882e550fde2185952114db92eaa700b31cb9ee7dd44791e8f78
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous embedded URLs, many of which point to potentially malicious redirectors. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. This suggests the primary purpose is to direct users to malicious infrastructure, likely for phishing or malware delivery.

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=nefarious+full+movie
    • http://files.laucandrique-en.com/uploads/1/3/1/6/131606619/9202608.pdf
    • http://zokig.saintgabriels.org/uploads/1/3/1/8/131871674/225541.pdf
    • http://pajefi.whatyouwantphotography.com/uploads/1/3/1/3/131379730/2090490.pdf
    • http://files.piommiami.org/uploads/1/3/0/7/130740357/zanajiki_witefitomoruni.pdf
    • http://pimatiwis.canudigitnursery.com/uploads/1/3/1/3/131382078/9005339.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/6459/7397/files/regex_golf_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dokole.pdf
    • https://cdn.shopify.com/s/files/1/0429/8945/3473/files/98081776971.pdf
    • https://cdn.shopify.com/s/files/1/0437/5900/9943/files/creative_and_critical_thinking_skills.pdf
    • https://cdn.shopify.com/s/files/1/0432/2151/6445/files/cours_automatisme_industrielle.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8573/files/13561202303.pdf
    • https://cdn.shopify.com/s/files/1/0434/5341/5576/files/dejebalamamaxirukefudasus.pdf
    • https://cdn.shopify.com/s/files/1/0433/9495/7466/files/categorical_data_analysis_sas.pdf
    • https://cdn.shopify.com/s/files/1/0437/2014/7095/files/4406615502.pdf
    • https://cdn.shopify.com/s/files/1/0438/1802/5122/files/5682821324.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/zisoguti.pdf
    • https://cdn.shopify.com/s/files/1/0428/1221/1359/files/43._2511023_86._037524.pdf
    • https://cdn.shopify.com/s/files/1/0437/9652/9313/files/workforce_thd550_manual.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_off0000bb8b.bin
0964af8172544e7b94414359c88889d24ccb165c0daca06be3ab25fca186fb58		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB8B 4940 bytes
font_01_sfnt_off0000cc4c.bin
ee6e3f3eeb453088db65637639dfb2d68f94303cd079335f902c879da4b12bc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC4C 10456 bytes

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