Malicious PDF — malware analysis report

Static analysis result for SHA-256 015623a802fcd49f…

MALICIOUS

PDF

44.6 KB Created: 2020-08-19 01:33:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef3d4dfde7fddce5e281715756264cb4 SHA-1: 60b7fd6955cfbff66fa877fc155ed34a153839f4 SHA-256: 015623a802fcd49ff8379d9f3fb73d7ebc5a43a9dcdd9a671b06deaff4af01c7
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains numerous embedded links, a technique often used in link farms to artificially boost search engine rankings or distribute malicious content. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=free+vehicle+bill+of+sale+template+alabama'. The document body, though heavily obfuscated, appears to contain text related to a bill of sale, likely a lure. The presence of a callback lure heuristic further suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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.ru/pify?keyword=free+vehicle+bill+of+sale+template+alabama
    • http://levono.shanemarshallphotos.com/uploads/1/3/0/7/130739024/rafipubatunotu-xarotatevafof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8113/7316/files/zirosidivotadun.pdf
    • https://cdn.shopify.com/s/files/1/0436/1335/6194/files/43651354227.pdf
    • https://cdn.shopify.com/s/files/1/0432/8351/3499/files/gibugejadofosaxa.pdf
    • https://cdn.shopify.com/s/files/1/0459/8343/2866/files/minecraft_guide_to_farming_book_big_w.pdf
    • https://cdn.shopify.com/s/files/1/0431/7279/0427/files/napa_filter_cross_reference.pdf
    • https://cdn.shopify.com/s/files/1/0432/4140/6631/files/simado.pdf
    • https://cdn.shopify.com/s/files/1/0436/3524/5214/files/baxojipubokodavi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5444/8286/files/76695860425.pdf
    • https://cdn.shopify.com/s/files/1/0433/0625/4494/files/19147687370.pdf
    • https://cdn.shopify.com/s/files/1/0439/7717/9294/files/ios_13_beta_7_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/9823/5289/files/conversions_worksheet_year_6.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_off00007089.bin
c9994968e89cd29a402ff10034304a667b06054cf7e60420ebf660b2bae315a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7089 5408 bytes
font_01_sfnt_off000082ce.bin
4251ccafc45d4b72da3db6d5b475b7fb5bce316c8811d909f48efd428078879a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82CE 10164 bytes

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