Malicious PDF — malware analysis report

Static analysis result for SHA-256 13209ecd7ff8627c…

MALICIOUS

PDF

36.8 KB Created: 2020-08-10 16:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e36bdf57ccefd23da0df604d505c3e76 SHA-1: b41d182e94db6f15528098dbc4084f658ae8ee99 SHA-256: 13209ecd7ff8627ce9f80c47cb987df08869bec52900b2005bed4a14754c3260
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=caballo+de+troya+6+hermon+pdf'. The document body itself contains obfuscated text and references to a "Caballo de troya" (Trojan horse), further indicating malicious intent. The presence of numerous links suggests an attempt to lure users to malicious sites, likely for further exploitation or credential harvesting.

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=caballo+de+troya+6+hermon+pdf
    • http://files.shoptoco.com/uploads/1/3/1/3/131381706/9844125.pdf
    • http://files.ttphotovideo.com/uploads/1/3/0/9/130969532/mefeg.pdf
    • http://files.7kmetalworx.uk/uploads/1/3/0/7/130775969/369f9811a0.pdf
    • http://wopolep.moebasketball.com/uploads/1/3/1/6/131607712/7843342.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8887/9521/files/pinowoju.pdf
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/ms_access_database_2020_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1438/files/55987073798.pdf
    • https://cdn.shopify.com/s/files/1/0437/2915/8295/files/study_guide_for_geometry_houghton_mifflin_company.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/71929045918.pdf
    • https://cdn.shopify.com/s/files/1/0430/7392/9378/files/xanibudujujivetiwixadoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/80065313257.pdf
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/xujelavonobibinu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9159/1317/files/20527713594.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19085525902.pdf
    • https://cdn.shopify.com/s/files/1/0432/5559/5172/files/lujisotupubosafe.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_off00004d22.bin
e2af805c55696ca0edf8487631559b25bccc3c7ffbb4d05e3f2d8882d9036507		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D22 5404 bytes
font_01_sfnt_off00005f60.bin
dfdd1817dc1a3785d613d6753891a0f6ad79a80e29f37e81e809792ff68b8639		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F60 11512 bytes

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