Malicious PDF — malware analysis report

Static analysis result for SHA-256 02aac237be0f481a…

MALICIOUS

PDF

44.5 KB Created: 2020-08-15 15:31:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c980825e7988aa1f01e772b3ed4caa1 SHA-1: eac52ffb959676aaaf7e2ee369bb68ead1cc858a SHA-256: 02aac237be0f481a36fbb676333ad5babe681b264f898ab58a6bd638e077d396
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, with one prominently pointing to a known malicious redirector infrastructure at `https://ttraff.com/wb?keyword=pretty%20woman%20guitar%20chords%20pdf`. The document also features a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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/wb?keyword=pretty%20woman%20guitar%20chords%20pdf
    • http://files.virginiaintegrativeosteopathy.com/uploads/1/3/0/9/130969876/kerupadidav_modew_sigesunewanosux.pdf
    • http://mudupo.wardwatkinsinsurance.com/uploads/1/3/0/8/130814174/wejovilexu.pdf
    • http://rekodux.intlconference.org/uploads/1/3/1/6/131606069/6057686.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81274949660.pdf
    • https://cdn.shopify.com/s/files/1/0434/2779/1009/files/63516854568.pdf
    • https://cdn.shopify.com/s/files/1/0437/8640/4000/files/precalculus_with_limits_3e_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/wilaxomonenidezumugijug.pdf
    • https://cdn.shopify.com/s/files/1/0432/0890/0768/files/rise_of_nationalism_in_europe_class_10_ncert.pdf
    • https://cdn.shopify.com/s/files/1/0437/8735/4270/files/33176700626.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/detroit_diesel_strain.pdf
    • https://cdn.shopify.com/s/files/1/0434/6249/2325/files/kakulifumokadatotatumuruf.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7621/files/60088697940.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nifafujejugafux.pdf
    • https://cdn.shopify.com/s/files/1/0432/7689/4372/files/62311458292.pdf
    • https://cdn.shopify.com/s/files/1/0434/0157/6604/files/73572444083.pdf
    • https://cdn.shopify.com/s/files/1/0431/9910/3136/files/5996585452.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_off00005c11.bin
80d645d805820888b3928542c6314825fefc069e93f5ef4d67029eb543e658a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C11 5612 bytes
font_01_sfnt_off00006f07.bin
94c958ef714e5feae519a3bd33ca796fba35ac3198476c4fcd2d07c8587b04a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F07 12256 bytes
font_02_sfnt_off00009661.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9661 4324 bytes

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