Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ab57428bb81b4a2…

MALICIOUS

PDF

41.8 KB Created: 2020-08-02 23:19:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 748518aa1534234aab8a24ce332a78e3 SHA-1: 9d25bf4cad8a25da06eace524f56c42f78ff49f8 SHA-256: 7ab57428bb81b4a2a3d74f18ace256f63c7ee881849727685af745a5e956c639
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 pointing to Shopify domains hosting other PDFs, and a critical link to a known malicious redirector at 'ttraff.com'. This indicates a link farm or SEO manipulation tactic, likely intended to distribute malware or phish users. The ML classifier strongly flagged this PDF as malicious, supporting the presence of malicious content.

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=weed+eater+push+mowers
    • http://files.tutorwithalice.com/uploads/1/3/2/7/132710780/5fe3509457bf.pdf
    • http://files.divorcecoachingandconsulting.com/uploads/1/3/0/8/130874518/bejam-soselovorifat-tekumubobup-powidonuvewadar.pdf
    • http://files.malbeads.com/uploads/1/3/1/3/131379792/jakixuku_bivubaxoreres.pdf
    • http://files.bigfoot411.com/uploads/1/3/1/4/131482823/7732697.pdf
    • http://files.alignwithenergy.com/uploads/1/3/0/7/130775982/012d5b75c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8461/1737/files/besujoxitepika.pdf
    • https://cdn.shopify.com/s/files/1/0431/1348/0354/files/mekibuxegajaponipibu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1438/8892/files/56084594727.pdf
    • https://cdn.shopify.com/s/files/1/0433/5714/3205/files/sojot.pdf
    • https://cdn.shopify.com/s/files/1/0435/4742/6965/files/finebabugubub.pdf
    • https://cdn.shopify.com/s/files/1/0431/8678/2369/files/30727154584.pdf
    • https://cdn.shopify.com/s/files/1/0429/7896/7703/files/lugukino.pdf
    • https://cdn.shopify.com/s/files/1/0436/2931/4206/files/3082422086.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/70820979070.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/7446261435.pdf
    • https://cdn.shopify.com/s/files/1/0440/0083/7782/files/23581612343.pdf
    • https://cdn.shopify.com/s/files/1/0430/6803/1143/files/jopepevabekagetisaso.pdf
    • https://cdn.shopify.com/s/files/1/0430/2356/4957/files/4128499442.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_off00006586.bin
2d255006efc709fb848e9d00ab84d1b4c72b6a44087504d0706291395d3167df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6586 5272 bytes
font_01_sfnt_off0000775a.bin
05d1cad4234e5b1e9f74aa0f9934e3b6268fc9cd180cb2e05f37c16dcbae9b09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x775A 10264 bytes

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