Malicious PDF — malware analysis report

Static analysis result for SHA-256 464be76206f380b3…

MALICIOUS

PDF

49.8 KB Created: 2020-10-29 03:52:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e08a5fe44bd37f33d313915c39ff8264 SHA-1: ad78f1b6b4497245aa5fda71c780fb2b2855db90 SHA-256: 464be76206f380b3923ea021f645cb719e43643a5ccca86ff53c8f83b1b4ab13
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector, 'https://ggtraff.ru/strik?keyword=how+to+plant+sugar+cane+in+minecraft', which is likely used to distribute further malicious content. 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://ggtraff.ru/strik?keyword=how+to+plant+sugar+cane+in+minecraft
    • https://cdn-cms.f-static.net/uploads/4383340/normal_5f93b670ed155.pdf
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/rutajotu.pdf
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/516247.pdf
    • https://cdn-cms.f-static.net/uploads/4410702/normal_5f97181a2ca96.pdf
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/d5e41b8380b73c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/taturi/lijokedoluzawuma.pdf
    • https://cdn.shopify.com/s/files/1/0431/5054/0964/files/classical_literature_a_very_short_introduction.pdf
    • https://cdn.shopify.com/s/files/1/0501/5709/3054/files/pizevature.pdf
    • https://s3.amazonaws.com/bulozor/xuxipiwovexopizimazigeguf.pdf
    • https://uploads.strikinglycdn.com/files/29275f46-264d-4836-b9e1-fbabe6a742e8/77641892332.pdf
    • https://s3.amazonaws.com/mamukawaxatali/92181749883.pdf
    • https://uploads.strikinglycdn.com/files/add3d6a5-f7f1-44f8-a042-4b45058d8ca1/45020234980.pdf
    • https://s3.amazonaws.com/felasorarabipis/robotics_in_civil_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0496/3752/3619/files/82555906760.pdf
    • https://s3.amazonaws.com/teximikamukubo/chess_for_beginners.pdf
    • https://s3.amazonaws.com/rekawexuretowo/12275391053.pdf
    • https://cdn.shopify.com/s/files/1/0266/9602/4259/files/90104153701.pdf
    • https://uploads.strikinglycdn.com/files/33684ceb-9ecc-41ef-8bb6-f3f94b5daf33/kakunimen.pdf
    • https://s3.amazonaws.com/susopuzupure/a1013_transistor.pdf
    • https://cdn.shopify.com/s/files/1/0462/3876/1109/files/newige.pdf
    • https://s3.amazonaws.com/zerejibixupav/acoustical_oceanography_principles_and_applications.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_off00008284.bin
1699e04973f8d5115e282eadb90369c401ff5caddafbbe30d66f0c24da057bac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8284 5388 bytes
font_01_sfnt_off000094da.bin
e68593e76684af480663ba4509c9ebb94a5cce31e331d0e6053f06c9c54ea1d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94DA 10712 bytes

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