Malicious PDF — malware analysis report

Static analysis result for SHA-256 613100cd2514c793…

MALICIOUS

PDF

51.5 KB Created: 2020-07-31 00:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cc6653f57bacc1a45afedb95976f077 SHA-1: a049517529ae6cf4a1846f6ff3f3046143544671 SHA-256: 613100cd2514c793b4582260bafece78fd5fe79da0e92bef45202f81941c1fe3
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text suggesting it is disguised as a comic book PDF. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm or redirection scheme designed to obscure the ultimate destination.

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.ru/pify?keyword=avengers+infinity+war+part+2+comic+pdf
    • http://files.presbyterianpreschoolec.org/uploads/1/3/0/8/130874582/kawibizoxobos.pdf
    • http://files.sewakwelfaresociety.org/uploads/1/3/0/8/130814774/papiruroboxedir.pdf
    • http://files.pinevalleyartisans.com/uploads/1/3/2/6/132682113/xuronapulixaf.pdf
    • http://files.heartofillinoisorff.org/uploads/1/3/1/3/131379371/9586210.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31321710084.pdf
    • https://cdn.shopify.com/s/files/1/0434/6619/5106/files/pevafusowukarejiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/8369/4247/files/kuvadegonum.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2623/files/58847010955.pdf
    • https://cdn.shopify.com/s/files/1/0440/6099/9830/files/43572440960.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2494/files/71511738284.pdf
    • https://cdn.shopify.com/s/files/1/0434/5731/4977/files/kogabokop.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/wanezorirudamu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9241/0525/files/3291741677.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zemeletitofugawekabol.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/87280367115.pdf
    • https://cdn.shopify.com/s/files/1/0432/7319/1588/files/45666092847.pdf
    • https://cdn.shopify.com/s/files/1/0432/9550/6592/files/58859981852.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_off00008880.bin
13c626fc065b205aaef42e25213618109181c6e512c54700523c6622a8a7663b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8880 5604 bytes
font_01_sfnt_off00009b8a.bin
7c4895fffdbc65daf08324cbb9cc8785fdd15f62c4c09fc395182efab29b664c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B8A 10876 bytes

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