Malicious PDF — malware analysis report

Static analysis result for SHA-256 67ea42c17f4d8ac9…

MALICIOUS

PDF

48.6 KB Created: 2020-08-07 08:42:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62486000df263e5176279ef09eee5776 SHA-1: b24a92a3f87e80e4afd77514306a4889dc687cab SHA-256: 67ea42c17f4d8ac9ec39993e9cc20d0e7892e25d7ceb3976034740ac7a3d696e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link that redirects to a known malicious URL, disguised as a free PDF to Word converter. This indicates a phishing or scam attempt, likely to lead users to further malicious content or downloads. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing 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.ru/pify?keyword=convertir+de+pdf+a+word+para+descargar+gratis
    • http://files.gresford.org.uk/uploads/1/3/1/4/131437385/foset.pdf
    • http://files.rioxpvista.com/uploads/1/3/0/8/130873717/dopenizuvonif_diruzexo.pdf
    • http://files.walkersonwater.com/uploads/1/3/2/8/132816096/ludidukevusu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/9381/1619/files/19623279524.pdf
    • https://cdn.shopify.com/s/files/1/0438/7156/8040/files/64212621077.pdf
    • https://cdn.shopify.com/s/files/1/0431/9733/3668/files/gexuwen.pdf
    • https://cdn.shopify.com/s/files/1/0432/0844/2020/files/semasidozozigikupa.pdf
    • https://cdn.shopify.com/s/files/1/0434/4230/7239/files/anemia_megaloblastica_hemograma.pdf
    • https://cdn.shopify.com/s/files/1/0432/9452/3552/files/momafawekonekotawu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6473/7438/files/163_e8_82_ba_e7_82_8e.pdf
    • https://cdn.shopify.com/s/files/1/0432/2813/5592/files/sudokusapemili.pdf
    • https://cdn.shopify.com/s/files/1/0428/4717/4812/files/94632386761.pdf
    • https://cdn.shopify.com/s/files/1/0447/7979/8679/files/automatic_transmission_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0437/files/mabuvitivatujibax.pdf
    • https://cdn.shopify.com/s/files/1/0434/0485/3402/files/xurakasapogiwef.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3253/files/how_to_be_anorexic.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_off00006f2f.bin
88fbae340d14fb921cdab2459a287a301f647d652fd9672451d9aed01ba60617		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2F 5256 bytes
font_01_sfnt_off00008131.bin
032ab029b1ebaad244be58b2e1d4a9ba1ecf8aa2a976180dab7fe46e341553f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8131 11532 bytes
font_02_sfnt_off0000a6ea.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6EA 4324 bytes

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