Malicious PDF — malware analysis report

Static analysis result for SHA-256 114c02eef484dcdd…

MALICIOUS

PDF

39.5 KB Created: 2020-08-17 16:37:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f2564af3250cf5d93e832e07d10f40f SHA-1: a30262853bf1cac206226bf1b34c24446721bafc SHA-256: 114c02eef484dcdd362738e7071a3ea29386e72620ef38aea791a281e8ca6de0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, a common tactic for SEO link farms or to distribute malicious content. One of these links, 'https://ttraff.com/pify?keyword=fsic+ii+fact+sheet', is identified as a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of malicious intent.

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.com/pify?keyword=fsic+ii+fact+sheet
    • http://rurawem.fineartbypatty.com/uploads/1/3/2/7/132710797/tejobafa-feweduzoduwil-jipap-zobuwobaxat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2912/6550/files/21218181482.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/abbasid_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0435/5319/4133/files/dumuduxovikajumidudadebi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/building_construction_company_profile_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/wesonufurazusolazu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2355/7030/files/vinugijanazimidaredej.pdf
    • https://cdn.shopify.com/s/files/1/0435/2229/3920/files/zeles.pdf
    • https://cdn.shopify.com/s/files/1/0440/7037/1493/files/nexifuwatonaju.pdf
    • https://cdn.shopify.com/s/files/1/0435/8314/4093/files/body_language_bangla_book.pdf
    • https://cdn.shopify.com/s/files/1/0427/4572/5094/files/fakamederumazoralosib.pdf
    • https://cdn.shopify.com/s/files/1/0437/0549/9803/files/zuzemugeruko.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5823/files/relidonejif.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_off0000605c.bin
4be0fcf17d77237bb3a5ac49f5fcdb0434e0f2f3fdc239bb4e4bef216925a9e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x605C 4796 bytes
font_01_sfnt_off000070a5.bin
9bb4c5e840d1cea9c5ac2f85ab7d43caa3195fcbf096a6ea5ab828f3ef11b71a
pdf-font-stream PDF embedded font (sfnt) at offset 0x70A5 9544 bytes