Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ea87050ffc868a1…

MALICIOUS

PDF

35.3 KB Created: 2020-08-06 10:54:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09d1e5336ade2f375f0349a9be590275 SHA-1: e056a2ad9376224512c26a52fe5943046b274f80 SHA-256: 9ea87050ffc868a18b37d5b26cb9b7bbde91ef45f3483df716e909c24a0f1f7d
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body also contains this URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on 'cdn.shopify.com', likely to improve search engine visibility for malicious content. No scripts were extracted from this sample.

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=astm+e8+pdf+download
    • http://loban.belfairphotogroup.com/uploads/1/3/1/4/131407668/3021012.pdf
    • http://files.lscf.ca/uploads/1/3/1/1/131164568/kosekesanupowog.pdf
    • http://vofufel.hackbarthhealing.com/uploads/1/3/2/6/132681556/wukoviromepuku.pdf
    • http://ganevezag.png1960.org/uploads/1/3/1/4/131482853/465a13d6020e7b.pdf
    • http://files.saleopardhunting.com/uploads/1/3/1/6/131606261/puwunokunexanodu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/15617863212.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8090/files/bizazirowenowasov.pdf
    • https://cdn.shopify.com/s/files/1/0431/9966/0194/files/tilikunazodurovapu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7259/4844/files/31886140821.pdf
    • https://cdn.shopify.com/s/files/1/0438/0426/2561/files/26490374713.pdf
    • https://cdn.shopify.com/s/files/1/0435/3110/8503/files/concepto_de_cambio_climtico.pdf
    • https://cdn.shopify.com/s/files/1/0437/9626/7168/files/18413754378.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuwuvedalolavotidexetugom.pdf
    • https://cdn.shopify.com/s/files/1/0437/1909/8523/files/3355547403.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0019/files/tirafeve.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/49252229302.pdf
    • https://cdn.shopify.com/s/files/1/0439/2806/0059/files/ford_f150_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/69602600520.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1549/files/rune_factory_frontier_characters.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_off00004c17.bin
0263cef8e3149e84c8ee38a318559b7603d5f42986a81902b2ab9e7b9e4e8e4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C17 5364 bytes
font_01_sfnt_off00005e5c.bin
2527cbe329afb94d020cea874f1cef23ca166b8a11764dd531feadb12f929fce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5C 10188 bytes

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