Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f9fe26fa7e9780a…

MALICIOUS

PDF

32.3 KB Created: 2020-08-25 00:11:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7bc447faa04b19121b8a7a7ee19e630 SHA-1: 2d1e7e607006d67b3ed00e182f4a8d1bb2c5f745 SHA-256: 6f9fe26fa7e9780a4556835bd257b2685224351bfcb82c256f2581de0a99b583
162 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document also features a 'download button' lure, suggesting a phishing or social engineering attempt. While no scripts were explicitly extracted, the PDF structure and embedded links indicate an attempt to redirect the user to malicious content, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=phyno+one+chance++video
    • http://files.xanderchiaramonte.com/uploads/1/3/0/8/130813461/7095272.pdf
    • http://rakufaga.maxey-droege.studio/uploads/1/3/1/4/131438563/7029492.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2626/7816/files/xijejelizifujoxel.pdf
    • https://cdn.shopify.com/s/files/1/0437/3485/9941/files/34834321842.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33647917740.pdf
    • https://cdn.shopify.com/s/files/1/0430/9693/2501/files/large_intestine_anatomy.pdf
    • https://cdn.shopify.com/s/files/1/0433/5311/2735/files/reactions_of_alkanes_alkenes_and_alkynes.pdf
    • https://cdn.shopify.com/s/files/1/0435/8176/7848/files/27634558304.pdf
    • https://cdn.shopify.com/s/files/1/0433/6956/2266/files/banaminudis.pdf
    • https://cdn.shopify.com/s/files/1/0430/2890/6138/files/jovilisagelub.pdf
    • https://cdn.shopify.com/s/files/1/0459/7055/5047/files/gifawapejib.pdf
    • https://cdn.shopify.com/s/files/1/0431/0571/4338/files/shoulder_arthroplasty_rehabilitation.pdf
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/que_es_un_astrolabio.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_off000042c1.bin
897b6a1bb577280f646aaacf5d9bccae556eb603da8f1468aa96bbff7f851fab
pdf-font-stream PDF embedded font (sfnt) at offset 0x42C1 4884 bytes
font_01_sfnt_off0000535d.bin
77dc56949f0b9e230730a42851b51ce47248c2588dfd1ee7e681699c7fe26464
pdf-font-stream PDF embedded font (sfnt) at offset 0x535D 9828 bytes