Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e691fb762db5868…

MALICIOUS

PDF

45.5 KB Created: 2020-08-06 18:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe6b42f4e8794444e6b6c8b22ce96364 SHA-1: ece601274e2b67afa1a6705898bde0e4810dc374 SHA-256: 6e691fb762db58687aa3e18380e1acc54e32c7a8fd7cdf4c9b0a0e66957bc0bd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search engine rankings or distribute malicious content. The presence of a malicious redirector URL strongly suggests an intent to lead users to harmful sites.

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.cc/pify?keyword=12v+battery+charger+circuit+with+overcharge+protection+pdf
    • http://files.adelaide-pilates.com/uploads/1/3/0/7/130739761/zijupepojumoviziwese.pdf
    • http://files.fhsproductions.com/uploads/1/3/0/7/130739366/kobezi_wotuxogated.pdf
    • http://wojofitid.eleanor-e-books.net/uploads/1/3/1/4/131437462/2903851.pdf
    • http://files.ramanava.com/uploads/1/3/2/6/132696323/862297eab.pdf
    • http://files.thesituationshortfilm.com/uploads/1/3/1/4/131453188/jibuwe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/environmental_biology_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5266/files/43518765873.pdf
    • https://cdn.shopify.com/s/files/1/0430/5692/2777/files/lexebodakopejitavesoxep.pdf
    • https://cdn.shopify.com/s/files/1/0437/5052/3029/files/best_astrology_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/2859/4336/files/gerimagejutuxawifunilo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4690/3709/files/9353098990.pdf
    • https://cdn.shopify.com/s/files/1/0432/9809/5272/files/aiden_caohman_vieques_kennedy.pdf
    • https://cdn.shopify.com/s/files/1/0435/3549/9418/files/55375147655.pdf
    • https://cdn.shopify.com/s/files/1/0436/0955/5107/files/como_hacer_referencias_bibliograficas_apa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3792/5269/files/conceptual_physics_12th_edition_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/namavoludanejafuxi.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_off00006294.bin
820811025fea7d97353eb30f97b840698abf5cdd37ecdb7255ec70956cea2c87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6294 5572 bytes
font_01_sfnt_off00007595.bin
c8d7c6527ef704c5189fdfe728e3653f0085d751408ce352014f65dbc2fbd362		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7595 10764 bytes
font_02_sfnt_off00009a7a.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A7A 4324 bytes

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