Malicious PDF — malware analysis report

Static analysis result for SHA-256 030d1d7b8aefb4f7…

MALICIOUS

PDF

39.9 KB Created: 2020-08-11 12:54:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40c4b1aaab1326a1c90d81501162afdc SHA-1: 14c9d1811daee2eb698c378b3fefdbfd7131447e SHA-256: 030d1d7b8aefb4f7546225d1d2ac00a808998834675752ff2d79cf6caca2a5e7
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One prominent link redirects to `https://ttraff.ru/pify?keyword=wolff+s+anatomy+of+the+eye+and+orbit+pdf+download`, which is flagged as malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness.

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=wolff+s+anatomy+of+the+eye+and+orbit+pdf+download
    • http://files.singersandactorsworkshop.com/uploads/1/3/2/7/132740218/mubazaxumadajag.pdf
    • http://puwujal.rushhourbiomedical.com/uploads/1/3/1/6/131606349/8135866.pdf
    • http://bozem.rushmerehallprimaryschool.com/uploads/1/3/2/7/132741555/2fc7e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zukax.pdf
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/77489422393.pdf
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/zibivovikuze.pdf
    • https://cdn.shopify.com/s/files/1/0435/6807/0824/files/kerikumesilujasujonila.pdf
    • https://cdn.shopify.com/s/files/1/0436/8223/4521/files/pathogenesis_of_neonatal_sepsis.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8815/files/7704526440.pdf
    • https://cdn.shopify.com/s/files/1/0432/3262/4808/files/7529151627.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/sinizolojidonagaremel.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupesuditijativerawepafu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4581/3413/files/vilimuwaganabimudutip.pdf
    • https://cdn.shopify.com/s/files/1/0431/9599/0175/files/97033650460.pdf
    • https://cdn.shopify.com/s/files/1/0429/7592/0282/files/anatomy_of_the_brachial_plexus.pdf
    • https://cdn.shopify.com/s/files/1/0431/3874/4476/files/85850676709.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_off00005c8c.bin
45d3e5f14c81bf611a6d6f32ed0420b35bbebea819192cf4eeea77c1d979141e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C8C 5628 bytes
font_01_sfnt_off00006f97.bin
df03ff586b014411d5ff6d624a583f4d33d225264ed97a579d843708ef0f26b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F97 10192 bytes

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