Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30fe10513ae5180…

MALICIOUS

PDF

44.8 KB Created: 2020-08-11 00:43:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07ed2c0ffd58b9d5a3824b6680e501c0 SHA-1: 70093ed9227bd47ad91a1ff8e7107f9f3aee9732 SHA-256: d30fe10513ae5180d353c896508661ae202651632a9299f00570c90678a37859
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to malicious content. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDFs hosted on various domains, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicated maliciousness.

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=definitions+of+history+pdf
    • http://files.lizbeckham.com/uploads/1/3/1/3/131380177/sasifadinazezi_sotolako_miwijileboso_pawaf.pdf
    • http://files.joanobeirne.com/uploads/1/3/0/9/130969889/furenibupa.pdf
    • http://files.dlfinancial.org/uploads/1/3/1/3/131379749/tobij.pdf
    • http://files.patagoniafallfestival.org/uploads/1/3/0/7/130739180/jozadag.pdf
    • http://files.knottyboards.com/uploads/1/3/0/9/130969762/nodozuwelobe_sujeseros_venuja_tewuzira.pdf
    • https://cdn.shopify.com/s/files/1/0432/5143/3627/files/american_english_file_4.pdf
    • https://cdn.shopify.com/s/files/1/0433/9187/7283/files/wuronawobasab.pdf
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/65472371285.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/warow.pdf
    • https://cdn.shopify.com/s/files/1/0431/3474/6790/files/31489484004.pdf
    • https://cdn.shopify.com/s/files/1/0430/1311/1961/files/18628435116.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/66174804100.pdf
    • https://cdn.shopify.com/s/files/1/0433/9869/3022/files/8486545981.pdf
    • https://cdn.shopify.com/s/files/1/0432/7407/6315/files/odds_of_winning_solitaire.pdf
    • https://cdn.shopify.com/s/files/1/0439/5424/1694/files/tadidizosurugo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0309/files/zavuwatevuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/89364655305.pdf
    • https://cdn.shopify.com/s/files/1/0433/8240/7335/files/31429151781.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072bd.bin
11fe29b3eaecaa0dd1201f2482c7c3259d3298dc133dd0b18a82d00f06296160
pdf-font-stream PDF embedded font (sfnt) at offset 0x72BD 4988 bytes
font_01_sfnt_off000083bd.bin
bf11451d2dccf6142f77cd8241a7b66b58a132c758c4ee94a73f1f5e2df41a7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x83BD 10032 bytes