Malicious PDF — malware analysis report

Static analysis result for SHA-256 61ed7cc51d7de998…

MALICIOUS

PDF

45.6 KB Created: 2020-08-03 13:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6705f98083cb0801437e6f671388d425 SHA-1: 54e7634f121cd332b45b5225bd80672a29c5f72f SHA-256: 61ed7cc51d7de9982a90837f4a327e3e03480724694964f348f71b6fbb0021b4
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning tactic. One of the primary links, https://ttraff.ru/pify?keyword=water+quality+data+analysis+and+interpretation+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, indicating an attempt to direct users to malicious infrastructure. The presence of numerous links and the malicious redirector strongly suggest a phishing or scam attempt.

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=water+quality+data+analysis+and+interpretation+pdf
    • http://files.trailoflife.org/uploads/1/3/0/9/130969895/lumeletefus.pdf
    • http://files.thunderbaytheatre.com/uploads/1/3/1/4/131453124/panolupazosewimalol.pdf
    • http://files.twolittleducksdesignstudio.com/uploads/1/3/1/6/131606638/0624a4c8169.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4887/7736/files/gajavofavovusesigivirud.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/43888945287.pdf
    • https://cdn.shopify.com/s/files/1/0429/3391/1705/files/43650517874.pdf
    • https://cdn.shopify.com/s/files/1/0433/2103/2859/files/kuzudopibutemuzuro.pdf
    • https://cdn.shopify.com/s/files/1/0438/3378/6525/files/cherry_tree_poem_questions_and_answers_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5870/files/26585190381.pdf
    • https://cdn.shopify.com/s/files/1/0436/6876/6873/files/lololavoromowobi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5663/4785/files/93167525823.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/golizikedakumeru.pdf
    • https://cdn.shopify.com/s/files/1/0429/8797/8913/files/26528579205.pdf
    • https://cdn.shopify.com/s/files/1/0434/0934/2614/files/87263232867.pdf
    • https://cdn.shopify.com/s/files/1/0431/3012/6496/files/sowok.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_off00007290.bin
25cf1f993dea0b3a258c1b50fdd0856c0661852f08791fa3cae90a5c6fa223e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7290 5276 bytes
font_01_sfnt_off000084a7.bin
ce1bc95d4bffeca2a7ba3f281a722c2b5a7ab8650e621f7d6659e9f2b0bd7db8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84A7 10824 bytes

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