Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b67c317b9c1432e…

MALICIOUS

PDF

44.0 KB Created: 2020-11-03 12:25:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97fe3f2e505c7798f6f32128f1197fe5 SHA-1: 152eec4f7203f186f9df48d3af38caf55afa4dc9 SHA-256: 1b67c317b9c1432efa0934a8698bf692fb1879458e491bd64799110e6803cab9
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one identified as a malicious redirector, disguised as a 'Panera bread survey site'. The heuristic firings indicate this PDF is part of a link farm designed to redirect users to potentially harmful content. While no scripts were directly extracted, the structure and embedded links strongly suggest a phishing or redirection attack.

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.me/123?keyword=panera+bread+survey+site
    • https://dexajuvado.weebly.com/uploads/1/3/4/4/134470202/memujiwovobono.pdf
    • https://xefosujusiro.weebly.com/uploads/1/3/4/0/134042031/3675636.pdf
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/razugekijes-vobofutonilafid.pdf
    • https://gowiwoniba.weebly.com/uploads/1/3/1/8/131857243/1865409.pdf
    • https://zavomori.weebly.com/uploads/1/3/4/3/134335150/8d5ce8.pdf
    • https://zatetemaf.weebly.com/uploads/1/3/4/4/134494585/nupumu.pdf
    • https://lififamofupuge.weebly.com/uploads/1/3/4/3/134317858/nowasekor.pdf
    • https://girejegi.weebly.com/uploads/1/3/4/4/134490844/posebivita_masidifosa_tobof_numiguderavalun.pdf
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/ragododilexukujab.pdf
    • https://legadiduzavof.weebly.com/uploads/1/3/2/6/132681829/5e9a227.pdf
    • https://koponabunabo.weebly.com/uploads/1/3/4/5/134520941/sebolonesavofajalo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mejifavo/12706685760.pdf
    • https://uploads.strikinglycdn.com/files/2400deed-94e8-40d8-8b3b-89ca2692b7b7/49581598318.pdf
    • https://s3.amazonaws.com/janodojivi/44981061719.pdf
    • https://uploads.strikinglycdn.com/files/910282fd-3817-4393-baf9-d16ea27d2b33/96929418724.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_off00006c5f.bin
e944362e21b057090e7b46b852c29a21ebc7d3a7e6aba5c07d510d4f56fee470
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5F 5088 bytes
font_01_sfnt_off00007dbe.bin
4d2b5a9d6c7337414bb6b802134da2cbde69da91ff64a817dd2622277f404baf
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBE 11096 bytes