Malicious PDF — malware analysis report

Static analysis result for SHA-256 6632146acad6d858…

MALICIOUS

PDF

57.8 KB Created: 2020-08-19 21:25:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aadb45c21887eeeea5547f27e9675c18 SHA-1: 17308dbe7e2ecd6e74adea9e6db53b9d0033f850 SHA-256: 6632146acad6d858176f7ab19d510fed64fb5d7b4b1b4ab14e0d52744302bb55
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominently pointing to a known malicious redirector. The document body, though partially corrupted, includes the same URL, suggesting a lure to a malicious site. The presence of numerous other PDF links further indicates a link farm, often used to obscure malicious destinations or for SEO manipulation.

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=mexican+king+snake+care+sheet
    • http://files.julialetters.com/uploads/1/3/1/4/131453498/peduwili-jeretefuwufuji-nilemizemupowe.pdf
    • http://files.katebond.org/uploads/1/3/2/3/132302732/lisozifo.pdf
    • http://files.joannawhiteflute.com/uploads/1/3/2/7/132740692/5552278.pdf
    • http://rigijade.kkylambdapsi.com/uploads/1/3/1/0/131071157/67af9f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2027/1264/files/rivotifatugup.pdf
    • https://cdn.shopify.com/s/files/1/0434/2372/7783/files/mimetufamafukezu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6987/4082/files/84604230705.pdf
    • https://cdn.shopify.com/s/files/1/0435/2324/4191/files/wuxisole.pdf
    • https://cdn.shopify.com/s/files/1/0435/2091/7668/files/gi_bleeding_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0438/5059/6512/files/neganemugivezol.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2337/files/myanmar_proverbs_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/5166/3012/files/71508027549.pdf
    • https://cdn.shopify.com/s/files/1/0447/7625/9735/files/loxigomipikativafam.pdf
    • https://cdn.shopify.com/s/files/1/0430/5390/8117/files/56498101259.pdf
    • https://cdn.shopify.com/s/files/1/0431/4746/0768/files/gumasomumudujeben.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_off0000a256.bin
2769bf5eee7dae40f771f1a750bd9bba97646dab1679dec5953187ab4560ef7c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA256 5168 bytes
font_01_sfnt_off0000b3ee.bin
7e2ddbede5649337eaa5c7a98128102eb0d9709d44fb08b68173ff27b3fbfeca
pdf-font-stream PDF embedded font (sfnt) at offset 0xB3EE 11612 bytes