Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e63a4cb4e6aad6e…

MALICIOUS

PDF

42.4 KB Created: 2020-08-19 23:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4aee8d3ffecad3a8450433814e11ae44 SHA-1: 56e98de2db8ed24c1a79ffb0717adbbe66812efa SHA-256: 5e63a4cb4e6aad6e90464e48104fc755cbbb6044b37175231aba7b4370729a06
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body and embedded links suggest an attempt to drive traffic to potentially harmful websites, possibly for SEO spam or phishing.

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=eia+report+of+highway+project
    • http://files.fresnonutritionsolutions.com/uploads/1/3/2/6/132683111/9806049.pdf
    • http://vapenifur.portsmouthwc.com/uploads/1/3/1/1/131164250/wodagemusakez-fajigibo-zotapuga-ruzebudapupiw.pdf
    • http://vajob.davidyardguitar.com/uploads/1/3/1/4/131454521/gadesanusopux.pdf
    • http://dofajut.mattmonfettlaxcamp.com/uploads/1/3/2/6/132696067/2390608.pdf
    • http://jutulogu.howtosayitbetter.com/uploads/1/3/1/8/131857631/wozal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/2177/7570/files/lupowibutenok.pdf
    • https://cdn.shopify.com/s/files/1/0433/8145/7061/files/runirotojenelibigukil.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29529942485.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8772/files/bioreactor_types.pdf
    • https://cdn.shopify.com/s/files/1/0434/0501/7249/files/82111763341.pdf
    • https://cdn.shopify.com/s/files/1/0430/7147/1767/files/abakada_tagalog.pdf
    • https://cdn.shopify.com/s/files/1/0430/2402/3715/files/wapexofuzub.pdf
    • https://cdn.shopify.com/s/files/1/0432/5736/4638/files/dinofinifufalizusig.pdf
    • https://cdn.shopify.com/s/files/1/0433/3430/3912/files/arthrex_distal_biceps_repair.pdf
    • https://cdn.shopify.com/s/files/1/0428/6509/8908/files/10256057803.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_off000068c2.bin
155400b08adf315a75ea936795819f72542ea616c14dd28b707ac89b7b2f35d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x68C2 5296 bytes
font_01_sfnt_off00007ae1.bin
103fcf93dfcea40d15b5eb65ec4b08196c7e122fd44c61879aef3fa55a6435c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE1 10024 bytes