Malicious PDF — malware analysis report

Static analysis result for SHA-256 0496ab52bf17c2e0…

MALICIOUS

PDF

68.3 KB Created: 2020-08-10 08:26:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c6259fc6cd338a97112acfcd55f1c1f SHA-1: 45173ec4229614c38d54daf5e7ab85daee9ee1ea SHA-256: 0496ab52bf17c2e027953518d294c890adb9216842bcfa9d9d40b9b9304beef9
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=capacity+building+plan+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of a large number of external PDF links further indicates a link farm or redirection strategy. No scripts were extracted, but the overall structure and URL suggest a phishing or malware distribution attempt.

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=capacity+building+plan+pdf
    • http://faxip.navesinkpta.com/uploads/1/3/0/7/130775162/7272738.pdf
    • http://files.boatshedgallery.com/uploads/1/3/1/4/131407552/7454102.pdf
    • http://files.barclayconsulting.co.nz/uploads/1/3/1/6/131636792/vumejelegesuvog_puvepowiz_vivojo.pdf
    • http://setofu.missrodeowashingtoninc.com/uploads/1/3/1/4/131453574/4387356.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/1060/5735/files/76941669333.pdf
    • https://cdn.shopify.com/s/files/1/0437/4115/1386/files/sutanulutafobazaxaziseve.pdf
    • https://cdn.shopify.com/s/files/1/0432/1456/9640/files/mititebufosowe.pdf
    • https://cdn.shopify.com/s/files/1/0436/9534/1723/files/10422187066.pdf
    • https://cdn.shopify.com/s/files/1/0434/3031/4133/files/98439083676.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/ischemic_stroke_definition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34292265756.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/wawixadikivuwewobiwuji.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lebalod.pdf
    • https://cdn.shopify.com/s/files/1/0435/1547/8176/files/12129309767.pdf
    • https://cdn.shopify.com/s/files/1/0430/3224/8469/files/arithmetic_reasoning_questions_and_answers.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_off0000cda2.bin
ed7f9f49a04545c265f6c7bd62cad88e43044c86c1c36b2d9cb377c1f095b0e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA2 5196 bytes
font_01_sfnt_off0000df6c.bin
dbf15cde5e0ef95fa0f62fb6132e2f869768dd21c946803c3eb78cb26456ba94		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6C 10740 bytes

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