Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f2cb5e16f4cb69d…

MALICIOUS

PDF

52.9 KB Created: 2020-08-17 09:15:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cec2b768e1d6b09c7e9cb946fa5bf4c7 SHA-1: bed0add648466b5e320204964e388ca41db2abfc SHA-256: 0f2cb5e16f4cb69d04a74852184618ddea1f027f825bbd1e39158eea30303165
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.ru/pify?keyword=bihar+anganwadi+application+form, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is intended to trick users into clicking it. The presence of numerous external PDF links further supports the classification as a link farm, likely for SEO manipulation or to distribute malicious content.

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=bihar+anganwadi+application+form
    • http://gemajepa.haveheartwellness.com/uploads/1/3/2/6/132681233/gizoduv-boloza-tepezubibe.pdf
    • http://files.healingbycaring.com/uploads/1/3/1/1/131164398/6411076.pdf
    • http://vigufe.pranicspark.com/uploads/1/3/0/8/130814328/pifaxo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0430/4994/3202/files/10494584280.pdf
    • https://cdn.shopify.com/s/files/1/0435/8635/5357/files/wow_classic_spider_ichor.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/9487539938.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40313354442.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/multivariate_data_analysis_hair_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/4760/8730/files/18104074114.pdf
    • https://cdn.shopify.com/s/files/1/0438/2294/0320/files/gipukiwalekik.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4266/files/63047449777.pdf
    • https://cdn.shopify.com/s/files/1/0431/0440/3613/files/xozemexifuxapid.pdf
    • https://cdn.shopify.com/s/files/1/0437/0835/0615/files/libros_de_bienestar_laboral.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7780/files/applied_physics_notes.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_off00006d49.bin
cff8bba40c894fcbb16cb4637fe31452c194197a770a6e68e1ef65b2612136fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D49 5532 bytes
font_01_sfnt_off00007ffa.bin
6d7b389ee7ec95995fb0e3d8c56775579eb2b81017d13832d93b52d1e97f0e95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FFA 10904 bytes
font_02_sfnt_off0000a46f.bin
f3b834667f9d248588233663c8067688ccf295c208d04148d500b7e0c3059cb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA46F 11152 bytes

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