Malicious PDF — malware analysis report

Static analysis result for SHA-256 126747eb4bddf596…

MALICIOUS

PDF

36.5 KB Created: 2020-08-24 04:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3c7d40776409afabac09f68a433c19c SHA-1: d01fd84ab9629fa4ad246eae12fc0c0c9306409e SHA-256: 126747eb4bddf596c3bda3eb339a48837a64700dfe03a2143cef90c49cba67fa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector URL. The document body, though heavily obfuscated, contains text related to a TV guide and the malicious URL. The presence of a link farm suggests an attempt to generate traffic or distribute malicious content.

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=sydney+tv+guide+wednesday
    • http://files.riataliadesigns.com/uploads/1/3/1/4/131453429/sedojewi_wupusoxuburut_dafafobolijib_sadex.pdf
    • http://files.paulsullivanleather.co.uk/uploads/1/3/1/4/131438069/309f879f0a30ad8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/9619/3686/files/percy_shelley_ozymandias.pdf
    • https://cdn.shopify.com/s/files/1/0433/9613/7111/files/vosipidewebabagijij.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/puneson.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/76986721754.pdf
    • https://cdn.shopify.com/s/files/1/0430/6475/4325/files/39165274251.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9870/files/4_hour_drug_and_alcohol_course_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/0073/3596/files/visuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/safuginogatujato.pdf
    • https://cdn.shopify.com/s/files/1/0432/5667/6510/files/4082356636.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_off000051a1.bin
5dd077c7220c735acde2651e54268ca27bafdfdf43c8ef1eed7860ea5bef8e31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51A1 5220 bytes
font_01_sfnt_off00006390.bin
a7250b7b0e9f9d424b2de032f915e13fb8e767061db86cf5442a929c213ee16b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6390 10040 bytes

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