Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b0a688905f59609…

MALICIOUS

PDF

47.0 KB Created: 2020-08-08 00:16:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2debf83d06c38a677c915a68b5659c3d SHA-1: 1f4e9e5d7f3f18a4c5534a036337b4b09174123c SHA-256: 4b0a688905f59609594e5700d81bc90255610630be56794006bc0e381174a42a
152 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, including a critical redirector link to 'ttraff.com'. The document body, though partially corrupted, suggests a lure related to an 'Ib business and management syllabus 2020 pdf'. The presence of a link farm and a malicious redirector indicates an attempt to lead the user to a malicious site, likely for further exploitation or credential harvesting. No scripts were extracted from this sample.

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=ib+business+and+management+syllabus+2020+pdf
    • http://files.komunitiruqyahsyariyyahsingapura.com/uploads/1/3/0/7/130739288/kazafavitovonizuvuva.pdf
    • http://files.lafayetteorchestra.org/uploads/1/3/1/1/131163666/2609410.pdf
    • http://files.getontheice.com/uploads/1/3/1/8/131871494/6523197.pdf
    • http://files.dcgymnastics.shop/uploads/1/3/0/7/130775701/lokopezuweluge.pdf
    • https://cdn.shopify.com/s/files/1/0430/6308/3170/files/27977541438.pdf
    • https://cdn.shopify.com/s/files/1/0431/7852/4831/files/62868116545.pdf
    • https://cdn.shopify.com/s/files/1/0432/5552/9640/files/html_link_to_bookmark.pdf
    • https://cdn.shopify.com/s/files/1/0430/6262/4417/files/fopiwonogujakofutego.pdf
    • https://cdn.shopify.com/s/files/1/0432/7325/7116/files/92548610742.pdf
    • https://cdn.shopify.com/s/files/1/0434/0373/9294/files/42444944848.pdf
    • https://cdn.shopify.com/s/files/1/0432/2898/7547/files/ratoxivuwivir.pdf
    • https://cdn.shopify.com/s/files/1/0431/7016/8986/files/dmv_form_262.pdf
    • https://cdn.shopify.com/s/files/1/0430/2841/4618/files/84380003698.pdf
    • https://cdn.shopify.com/s/files/1/0438/6743/9264/files/5747077113.pdf
    • https://cdn.shopify.com/s/files/1/0432/2548/1379/files/alpha_amylase_inhibitory_activity.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_off00007008.bin
30f2f77f43e8fde44a430ef7a17110ceae8cf3f1ad6a03c39fc2147688ae5853
pdf-font-stream PDF embedded font (sfnt) at offset 0x7008 5720 bytes
font_01_sfnt_off00008374.bin
ec58ec5aa47d172204b8549503889013dd29ce9eb854d6b0efd7b9c3c27fe933
pdf-font-stream PDF embedded font (sfnt) at offset 0x8374 13968 bytes