Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d5818b9edad64a8…

MALICIOUS

PDF

47.9 KB Created: 2020-08-21 18:28:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd9336e9f05a388d910a44bc90c47060 SHA-1: ae9d17d4c9ec2d216fbf7898596fda9f9b7f4075 SHA-256: 7d5818b9edad64a83eba45581eead7e0eb3dd143eb3e1167cab783d6985834b2
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to redirect the user to a malicious site. The presence of numerous Shopify links, while many are benign, indicates a potential link farm strategy to obscure the malicious 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.com/pify?keyword=chapter+11+nutrition+and+diets+worksheet+answers
    • http://files.batrssocal.com/uploads/1/3/1/3/131384789/vipibifoxoteroxu.pdf
    • http://files.lulabellestyle.com/uploads/1/3/0/8/130814534/lenupomozonor-luris.pdf
    • http://pajudiz.dockconnectionllc.com/uploads/1/3/1/0/131070872/wipupavokekes_xovipad_wupugalafunexub.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9177/7949/files/noun_suffix_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/mupawivitutaxopezofuwasiw.pdf
    • https://cdn.shopify.com/s/files/1/0434/3654/0056/files/gozebixawaxamogusixijak.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/fenawi.pdf
    • https://cdn.shopify.com/s/files/1/0450/5151/0936/files/fintech_malaysia_report_2017.pdf
    • https://cdn.shopify.com/s/files/1/0439/3353/2315/files/english_grammar_tenses_in_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0429/9299/2410/files/blender_2._8_grease_pencil.pdf
    • https://cdn.shopify.com/s/files/1/0447/9310/2493/files/bombay_high_court_recruitment_2020_clerk_exam_paper.pdf
    • https://cdn.shopify.com/s/files/1/0432/9812/8036/files/52527030488.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_off00007d4d.bin
29b9d2cf3f2588408241158b3f38412653377e72e2d88a027d126b7b01afba52
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4D 5128 bytes
font_01_sfnt_off00008ece.bin
1c9c322b33c6304f7500f8707d2209afbe20d5e7bafa3c03b5c5214ac536d60e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8ECE 10476 bytes