Malicious PDF — malware analysis report

Static analysis result for SHA-256 e964f0e63a7c2213…

MALICIOUS

PDF

51.7 KB Created: 2020-08-07 12:39:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0e8b49a5c9e945c0951564d59d85b00 SHA-1: 872ffe344220dbf80948fb0b6b5f5861ecfacaf1 SHA-256: e964f0e63a7c2213fa335646669b05dec68aaa263a8396180cc1ac707e076466
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a critical redirector link to ttraff.com, indicating a malicious redirection attempt. The document body text, though partially corrupted, includes the same keywords as the malicious URL, suggesting a lure for free PDF downloads. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a redirection-based attack pattern.

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=1000+canciones+y+acordes+de+guitarra+pdf+gratis+descargar
    • http://files.ckrblues.com/uploads/1/3/1/4/131405977/725eb9e.pdf
    • http://files.frontroomon7th.com/uploads/1/3/1/8/131871501/fivonetivokavow_faxojawigutasa_suxivadisule.pdf
    • http://files.bodycreationpersonaltraining.net/uploads/1/3/1/4/131483371/3731431.pdf
    • http://files.oneofakindent.com/uploads/1/3/0/7/130739366/8871146.pdf
    • http://bltlly.com/13tcxu
    • https://cdn.shopify.com/s/files/1/0431/9241/8468/files/riterajasaxizifapobadevan.pdf
    • https://cdn.shopify.com/s/files/1/0430/8720/0418/files/sizalurinuvidumeruliv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lorirazapevimixawas.pdf
    • https://cdn.shopify.com/s/files/1/0429/9309/0714/files/98151565614.pdf
    • https://cdn.shopify.com/s/files/1/0434/0996/5212/files/3575318934.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jedufejaselikaruratemop.pdf
    • https://cdn.shopify.com/s/files/1/0428/3272/4124/files/5409047727.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/bangalore_central_university_time_table_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/6304/9376/files/83945954660.pdf
    • https://cdn.shopify.com/s/files/1/0429/6487/7471/files/labininudurozoxogunefu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1434/7160/files/adobe_photoshop_cs4_tutorials_for_beginners_free_download.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007cc4.bin
805719ffe267c6211c32ebf2bc9a2b00a0579345eeea7c1511535a2ce84ae374
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC4 5492 bytes
font_01_sfnt_off00008f8d.bin
43408917aa4d54c9fdf8c6a4e23f91cd1ebc82d608f069db3316814b432b25b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F8D 16836 bytes