Malicious PDF — malware analysis report

Static analysis result for SHA-256 08681c1f8fbcf3ec…

MALICIOUS

PDF

41.4 KB Created: 2020-08-19 11:17:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff11e7d3476b96f014d50b58e1644091 SHA-1: 70915b433d425b0165aaf54112c65a126655b2e9 SHA-256: 08681c1f8fbcf3ec650acc8980a4f3a4bfcf729b23abf0a82a339559c8a6d49c
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which points to `https://ttraff.cc/pify?keyword=asmedia+usb3.+1+extensible+host+controller`. This suggests the document is designed to redirect users to malicious infrastructure. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm or SEO poisoning attempt, likely to obscure the malicious redirector. No scripts were extracted, but the embedded URLs and heuristics strongly suggest a phishing or malware distribution lure.

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=asmedia+usb3.+1+extensible+host+controller
    • http://files.hprengines.com/uploads/1/3/1/8/131856353/2474378.pdf
    • http://files.mindandmusecrafts.com/uploads/1/3/0/8/130874205/111313.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zenafepejeviwasi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9862/files/76981377639.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0757/files/mcdonalds_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/9081/2821/files/lodig.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/5304957105.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/excel_macro_lookup_value_another_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/0316/6369/files/ashrae_90._1_user_s_manual_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/2670/1723/files/72137858876.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1716/files/79994893075.pdf
    • https://cdn.shopify.com/s/files/1/0443/4133/0076/files/rocky_iv_soundtrack.pdf
    • https://cdn.shopify.com/s/files/1/0427/4470/9276/files/waxexadasumof.pdf
    • https://cdn.shopify.com/s/files/1/0448/1161/6418/files/procedimento_cautelare_uniforme.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053dc.bin
94180ca900b7a3ce97d5dc233773d63345c30fec18e2094c3484b7c7dbdbbf33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53DC 4304 bytes
font_01_sfnt_off00006305.bin
341b3d93bee6ba8f7bec72f5a7bda402d2b499c3caa9c0a0e3519991fe54629f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6305 5624 bytes
font_02_sfnt_off000075f0.bin
7eabf3d5751b24993e770ab5389623c77db2c556a784c0752351e5d10c736ba7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75F0 10296 bytes

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