Malicious PDF — malware analysis report

Static analysis result for SHA-256 8abe7b9839a2cdf9…

MALICIOUS

PDF

43.8 KB Created: 2020-08-18 19:03:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d17ff65aedf2fac735a2b2ea2329fd0c SHA-1: fde01fc2534b658f2021b82e23e2895f6b5e2148 SHA-256: 8abe7b9839a2cdf917b5d33085faf512dd148c89f7e892820876f2da5a657f11
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links, with one critical heuristic firing indicating a link to known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains text suggesting a report title, likely a lure. The presence of a link farm further supports a social engineering attempt to drive traffic to potentially malicious 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.com/pify?keyword=cofco+meat+annual+report
    • http://files.beyourradiantself.com/uploads/1/3/2/7/132712127/roleki_famim.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bijalikupuxamimidesedol.pdf
    • https://cdn.shopify.com/s/files/1/0431/3622/1341/files/zuzewisidegaxodununopabid.pdf
    • https://cdn.shopify.com/s/files/1/0430/7304/4634/files/rejebetetixapefebipeg.pdf
    • https://cdn.shopify.com/s/files/1/0440/3052/5590/files/advanced_ms_excel_2020_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0435/8003/1137/files/general_characters_of_aves.pdf
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/lipunalebutiduluxagifi.pdf
    • https://cdn.shopify.com/s/files/1/0440/5788/6870/files/samsonite_luggage_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1384/files/bhagavad_gita_slokas_in_telugu_with_meaning_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/60739539363.pdf
    • https://cdn.shopify.com/s/files/1/0447/3477/5445/files/cg_police_vacancy_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/1387/2548/files/adjective_list_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rapuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/nodirevirinuxoxuzogilu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4745/files/30990863851.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/40487486177.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004bcf.bin
5bd5c0e9b674b866dbccedb93010c2fed54ec93af9d8c42d47e614e0dfb27114		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BCF 5372 bytes
font_01_sfnt_off00005e60.bin
4d9d2e4ee385396b982fe2fb7d5737bf28b53b77b91564a393bf66a3fd28c60f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E60 4840 bytes
font_02_sfnt_off00006eba.bin
e9ac6a170d88fdd332e61c09e9bc98577d269c4ab76350dcc9eff140c4376cce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBA 10424 bytes
font_03_sfnt_off0000925d.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x925D 4324 bytes

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