Malicious PDF — malware analysis report

Static analysis result for SHA-256 0347deba8ec9ef2d…

MALICIOUS

PDF

46.9 KB Created: 2020-08-06 21:29:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0eb2168479d813689b8c4d59e22a6131 SHA-1: e029c87c741b275245b2c8df1b0ea2eefa276389 SHA-256: 0347deba8ec9ef2d8321c64948bfa9f827bd493bc42373b48ffd52ea12b62ccb
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL. The presence of numerous other PDF links, many pointing to external sites, suggests a link farm or redirection scheme designed to lead users to malicious content. No scripts were extracted, but the primary attack vector appears to be the embedded malicious URL.

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=anaerobic+threshold+pdf
    • http://files.ljhskdill.com/uploads/1/3/0/7/130738700/ganizu.pdf
    • http://gukilav.krisbenyopottery.com/uploads/1/3/1/6/131607163/ranakifo_magojesulok.pdf
    • http://files.micropowernanomag.com/uploads/1/3/0/7/130775472/basavopawukufir.pdf
    • http://zizop.uofcfilmsociety.com/uploads/1/3/1/4/131453284/8026678.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/4118/5189/files/maxefopolewi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0180/6997/files/85260078949.pdf
    • https://cdn.shopify.com/s/files/1/0436/2957/6352/files/6295730255.pdf
    • https://cdn.shopify.com/s/files/1/0431/7695/1957/files/vunalizawad.pdf
    • https://cdn.shopify.com/s/files/1/0431/6889/1040/files/99917376133.pdf
    • https://cdn.shopify.com/s/files/1/0432/0064/3236/files/67743882420.pdf
    • https://cdn.shopify.com/s/files/1/0431/3602/4742/files/domebegopene.pdf
    • https://cdn.shopify.com/s/files/1/0431/5096/6950/files/73020950129.pdf
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/pejivelavigafovodo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6540/1753/files/konogaxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8163/7794/files/lepoxogovivup.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_off00006c27.bin
1809d32efbd464129fe80daf751c5348fece3b94b1a56713c77a9089fa26d92a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C27 5160 bytes
font_01_sfnt_off00007d99.bin
f2c703648d04d33e56b092d7c31751e3aae376910756efa74eec4a83736d195d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D99 10348 bytes
font_02_sfnt_off0000a0ed.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0ED 4324 bytes

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