Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d7153c031df5c64…

MALICIOUS

PDF

44.9 KB Created: 2020-08-25 05:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54e5248b5da2f8e674b0d1cf4a793bb3 SHA-1: f4bf9abd088ece205a1c2176f61dc1d89c081c29 SHA-256: 6d7153c031df5c640d42b0e29a83b39dcd4da187cc12409d67a9549503d91318
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a redirector to malicious infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to distribute content or lead users to malicious sites. The presence of a password-protected archive lure suggests a multi-stage attack where the actual payload is hidden.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=que+es+el+marketing+de+guerrilla+pdf
    • http://files.jdprestaurants.com/uploads/1/3/1/4/131405977/956fe05f46ca2ac.pdf
    • http://zibujen.lakeodessaarts.com/uploads/1/3/1/4/131454215/tosivepekivo.pdf
    • http://lozof.makingestatement.com/uploads/1/3/2/6/132682533/zanofonawa.pdf
    • http://files.dcganshalom.org/uploads/1/3/0/7/130776817/1088148.pdf
    • http://zitukaveg.trailofmusiclegends.com/uploads/1/3/1/3/131383708/39f4a5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7571/4715/files/abs_cbn_tv_plus_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/jesubofupasivonamego.pdf
    • https://cdn.shopify.com/s/files/1/0433/2109/8408/files/anemia_megaloblastica_hematologia.pdf
    • https://cdn.shopify.com/s/files/1/0434/3106/7813/files/15746403072.pdf
    • https://cdn.shopify.com/s/files/1/0432/0047/9391/files/w02m_bridge_rectifier.pdf
    • https://cdn.shopify.com/s/files/1/0427/7937/7830/files/fokunovazojavabepul.pdf
    • https://cdn.shopify.com/s/files/1/0437/6874/2040/files/wogusuxinamuso.pdf
    • https://cdn.shopify.com/s/files/1/0436/3173/9033/files/biodata_sample_file.pdf
    • https://cdn.shopify.com/s/files/1/0429/4646/1852/files/adobe_illustrator_cc_free_trial.pdf
    • https://cdn.shopify.com/s/files/1/0431/3533/6605/files/43361620482.pdf
    • https://cdn.shopify.com/s/files/1/0433/3345/1944/files/woronodowisirapi.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_off00006da7.bin
4aeed4070b6f1bac344bf684e9a7cb9664623a9c2057b001176fbef513c0b96e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA7 5488 bytes
font_01_sfnt_off0000803a.bin
25b0f92f97dec56e89b804a97cad433cabddc2727b6293bd082173fb4411ec22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x803A 11356 bytes

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