Malicious PDF — malware analysis report

Static analysis result for SHA-256 013504f2388f076c…

MALICIOUS

PDF

40.9 KB Created: 2020-08-04 11:02:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6d282f66149a4c5049329236147e48c SHA-1: 5b625d24a6e3ef4d2efde86e461ecf773a8f8478 SHA-256: 013504f2388f076cfa1c0d71286fff35e314c617703d20ebb26bd45114b59a0a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text suggesting a lure for downloading a file, likely related to a resume or job application. The presence of numerous external PDF links further supports a link farm or redirection tactic.

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=resume+letter+pdf+file+download
    • http://files.scituatefoodpantry.org/uploads/1/3/0/7/130740292/cc9e582f7285.pdf
    • http://files.haslettfootball.com/uploads/1/3/0/7/130740517/rovitilama.pdf
    • http://files.ccmplbca.com/uploads/1/3/0/9/130969659/wujufudedam_zilagud_buvaguxutabot.pdf
    • http://files.bellaandbrown.com/uploads/1/3/1/1/131164313/caa36cb02de.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/20297216964.pdf
    • https://cdn.shopify.com/s/files/1/0434/9417/8982/files/fogevugu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/49824826530.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lugapib.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/tumisapagigig.pdf
    • https://cdn.shopify.com/s/files/1/0432/5824/9376/files/85784000820.pdf
    • https://cdn.shopify.com/s/files/1/0434/3490/1660/files/62067895979.pdf
    • https://cdn.shopify.com/s/files/1/0432/6234/5384/files/mikurexexewuvelaguk.pdf
    • https://cdn.shopify.com/s/files/1/0430/6183/7981/files/32328811206.pdf
    • https://cdn.shopify.com/s/files/1/0434/3237/8517/files/povesaxex.pdf
    • https://cdn.shopify.com/s/files/1/0430/3237/9545/files/nozaximuwaxixofavadujogi.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_off00006224.bin
8767a5e9c57049e2057b9066f31c551d5a712afb99d6093761228cd3b606afa3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6224 5284 bytes
font_01_sfnt_off0000741b.bin
3db610c885ce12e2fc924d17016a586d4db63671c89404e5c7ab5d614d573e06
pdf-font-stream PDF embedded font (sfnt) at offset 0x741B 10176 bytes