Malicious PDF — malware analysis report

Static analysis result for SHA-256 604691be3ab608f8…

MALICIOUS

PDF

35.7 KB Created: 2020-08-12 02:47:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d301d1b4fb40bee118a0bd46da94cb3 SHA-1: 7fc60108b8c627d0f34fdd40731dc594be6f790c SHA-256: 604691be3ab608f85627e51945f7da3b03c21f781cc0784c641d23d9ef2c8f00
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains text that appears to be a lure related to a technical PDF, and also includes the malicious URL. The ML classifier strongly indicates maliciousness.

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.ru/pify?keyword=gauge+theories+in+particle+physics+volume+ii+pdf
    • http://files.upwellings.com/uploads/1/3/1/4/131453252/momomapafugiz_zuvoxetejade_majose_pubozevurexeguj.pdf
    • http://files.wales-on-wheels.com/uploads/1/3/2/6/132681812/jebekosozira.pdf
    • http://fiwaf.superiorwayoflife.com/uploads/1/3/1/4/131453109/4542862.pdf
    • http://files.stowefamilywellness.com/uploads/1/3/0/7/130739648/4953447.pdf
    • http://mopabuf.massage-solace.com/uploads/1/3/1/1/131164250/garuwufozogeg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62092070186.pdf
    • https://cdn.shopify.com/s/files/1/0428/8859/3567/files/cbse_class_11_biology_notes_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/2735/8115/files/45422098364.pdf
    • https://cdn.shopify.com/s/files/1/0437/7542/6722/files/vexudironerufaga.pdf
    • https://cdn.shopify.com/s/files/1/0433/3099/4326/files/gigeguviporuzobava.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/gawudivamafusug.pdf
    • https://cdn.shopify.com/s/files/1/0436/9340/8409/files/cities_skylines_road_hierarchy.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8172/files/zulimamojedinutijo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7917/files/gorirazelanuv.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_off00004c8e.bin
c539ec478f69404a11597f5c197b43e079a93724e3bf9a0079ff2bc57c086a31
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C8E 5760 bytes
font_01_sfnt_off00006011.bin
0997ced12f2f73b99baad982fa2d96f341735aec2c9b9a00efda37f4bad8b150
pdf-font-stream PDF embedded font (sfnt) at offset 0x6011 9936 bytes