Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b5dd401b9861e7…

MALICIOUS

PDF

37.3 KB Created: 2020-08-11 23:40:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7a415a4041e1c78fec0586321cf4bea SHA-1: 1b802071601e80596153d1426cf7d109fc3ac81f SHA-256: 30b5dd401b9861e78d4e5b4677fce190461ef341675dc52470fa58409cb77384
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links, one of which, 'https://ttraff.cc/pify?keyword=bestanden+samenvoegen+naar+pdf', is identified as a malicious redirector. The document body, though partially corrupted, contains text related to file conversion and the malicious URL, suggesting a social engineering lure. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm designed to obscure the malicious destination.

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/pify?keyword=bestanden+samenvoegen+naar+pdf
    • http://files.rosemarygallagher.com/uploads/1/3/0/8/130813373/2cd2a741464.pdf
    • http://files.neoshoalumni.org/uploads/1/3/1/4/131407227/9460888.pdf
    • http://fitetil.arf-private-investigators.com/uploads/1/3/1/4/131438539/vogiwoginuguf_bipito.pdf
    • http://files.echeloncatapult.org/uploads/1/3/0/7/130738679/a2b31da6d8.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/national_antibiotic_guidelines_2020_doh.pdf
    • https://cdn.shopify.com/s/files/1/0431/4585/5137/files/balance_sheet_analysis_ratios.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7367/files/javemizimedewamisuga.pdf
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/lomuzimivajolanalexilizus.pdf
    • https://cdn.shopify.com/s/files/1/0436/4717/2768/files/5604924762.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13534048661.pdf
    • https://cdn.shopify.com/s/files/1/0433/2643/9582/files/32073307639.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0861/files/geometric_construction_engineering_drawing.pdf
    • https://cdn.shopify.com/s/files/1/0434/2841/3607/files/voyage_century_online.pdf
    • https://cdn.shopify.com/s/files/1/0438/6547/3184/files/portal_test_chamber_15.pdf
    • https://cdn.shopify.com/s/files/1/0431/0482/9602/files/nigumimibusepalava.pdf
    • https://cdn.shopify.com/s/files/1/0429/4197/2646/files/15864216584.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005256.bin
3ed7362f081c60cfa5fef39cc7b453ab723a0d2e8fedc438e60f680b9eae99e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5256 5436 bytes
font_01_sfnt_off000064cb.bin
b2bdc648744546d4d0eee44b74571baf05a81a396c6043432fe2bf15643004f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64CB 10116 bytes

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