Malicious PDF — malware analysis report

Static analysis result for SHA-256 036d0f040e5200c9…

MALICIOUS

PDF

45.9 KB Created: 2020-08-07 13:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f89d1a9beac0add0b940a6471d68bff7 SHA-1: fc5ee35684890f13f956d3e237896bae6030861a SHA-256: 036d0f040e5200c917c6c3aab550cfd216fe728f0226286d1057cf467c59fb5e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body also contains this URL, suggesting an attempt to lure the user to a malicious site. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the true destination.

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=internet+intranet+and+extranet+difference+pdf
    • http://samedene.schlosskiwi.com/uploads/1/3/0/7/130776487/1911576.pdf
    • http://files.lqblackpool.co.uk/uploads/1/3/1/6/131637178/f83cdf.pdf
    • http://files.wellnesstourismworldwide.com/uploads/1/3/2/7/132710780/golavaniga-bizaronudet-wugajobi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/3427/0117/files/nisirazadaropizavi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1356/2787/files/41689903482.pdf
    • https://cdn.shopify.com/s/files/1/0438/6498/1664/files/80250711109.pdf
    • https://cdn.shopify.com/s/files/1/0435/3504/0664/files/xokido.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/zaluxiremetozew.pdf
    • https://cdn.shopify.com/s/files/1/0435/1809/9615/files/gasotukodedodir.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1073/files/voltage_regulation_of_transformer.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21533622499.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/autocad_architecture_tutorials.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3789128943.pdf
    • https://cdn.shopify.com/s/files/1/0429/3669/6995/files/cours_d_alphabtisation.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/dixetaxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25424470269.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85947343199.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_off0000762d.bin
cf93ac41418056d22bf5713de7a22f8cf9b5648251386235778e096529c5b940		 pdf-font-stream PDF embedded font (sfnt) at offset 0x762D 4944 bytes
font_01_sfnt_off00008716.bin
7acc978f0099bc3682e4f309b70c18985852ebe80b7d4808818e93e3a75fc7af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8716 10244 bytes

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