Malicious PDF — malware analysis report

Static analysis result for SHA-256 6468b5bdea344e88…

MALICIOUS

PDF

69.5 KB Created: 2020-08-11 07:43:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0792b4b2d581ad087a085d4e61914ca9 SHA-1: f3160cd990744bcd68c33a02bf52fe11a5a14cd3 SHA-256: 6468b5bdea344e88993c8f210495de3cad9a1faf99a433829784545a52650626
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 a link farm designed to improve search engine rankings. One prominent link, 'https://ttraff.com/pify?keyword=role+of+social+worker+in+community+development+pdf', is identified as a malicious redirector. This suggests the document is designed to trick users into visiting malicious websites, likely for phishing or malware distribution.

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=role+of+social+worker+in+community+development+pdf
    • http://files.iriswynne.com/uploads/1/3/0/9/130969192/jiluvelebab.pdf
    • http://files.cynthiawidawski.com/uploads/1/3/1/0/131070861/371a75a038.pdf
    • http://files.pstreetstudio.com/uploads/1/3/1/3/131384025/7f3b7b7a.pdf
    • http://files.simplified-networking.com/uploads/1/3/1/0/131071056/basiziwipos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0745/1041/files/35452039618.pdf
    • https://cdn.shopify.com/s/files/1/0428/1512/7708/files/academic_research_writing.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5682/files/65437812432.pdf
    • https://cdn.shopify.com/s/files/1/0429/9623/6447/files/gipemeredogozepav.pdf
    • https://cdn.shopify.com/s/files/1/0437/1942/6198/files/pejanodelusetodajep.pdf
    • https://cdn.shopify.com/s/files/1/0447/3955/9578/files/general_interview_questions_and_answers_for_experienced.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53059057271.pdf
    • https://cdn.shopify.com/s/files/1/0430/8788/8535/files/vanilla_wow_alliance_leveling_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/8797/0975/files/60514544891.pdf
    • https://cdn.shopify.com/s/files/1/0431/0653/3525/files/gefoxezewefizokobad.pdf
    • https://cdn.shopify.com/s/files/1/0437/6988/8929/files/d3_patch_2._3.pdf
    • https://cdn.shopify.com/s/files/1/0433/5242/4598/files/83432222489.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38692385895.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_off0000d12e.bin
7dcc28c96d8f3954ca47cf3ec4348377e438f112c4051d694ce0d31dd6b0d88d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD12E 5624 bytes
font_01_sfnt_off0000e45d.bin
5b6244bd63e4174bed94bffe0aadd30aab6df58ab8ec294a2a21c52ec11f60a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE45D 10512 bytes

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