Malicious PDF — malware analysis report

Static analysis result for SHA-256 15afddfe29341b59…

MALICIOUS

PDF

50.3 KB Created: 2020-09-10 01:21:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3edf395c9c1dc42b287dafba361cc0a3 SHA-1: 2bc931f9ba2999f6d9b6a654802a236bca997ebc SHA-256: 15afddfe29341b598c242c207eb9f685e086f7df4aa42d5935cc4e46cb316dcb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with a critical heuristic firing for a malicious redirector link. The document body, though partially corrupted, includes text related to a PDF download and the malicious URL, suggesting a lure. The presence of a large number of external PDF links points towards SEO manipulation or a link farm tactic.

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/wix?keyword=pernkopf+topographic+anatomy+of+man+free+pdf
    • http://fifilul.gerrygillespie.net/uploads/1/3/0/7/130776659/fonuxetorivada_sivavovizerakug_nejimuzorugisur_bupodoxamuf.pdf
    • http://files.graham-enniskillen.com/uploads/1/3/0/9/130969705/perekos.pdf
    • http://seduz.ucddowntown.org/uploads/1/3/0/9/130969140/ruzego.pdf
    • http://files.fullstrokebilliards.com/uploads/1/3/1/4/131453522/xeduludidixubo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1778/0896/files/lozizorel.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/analytical_chemistry_skoog_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/3198/5309/files/army_apft_score_chart_sit_ups.pdf
    • https://static.usrfiles.com/ugd/4b68be_0bf861c3678c4790b0d90fec67df342f.pdf
    • https://static.usrfiles.com/ugd/6e13d9_c9c589f19033422bb4c86f4b3b495107.pdf
    • https://static.usrfiles.com/ugd/af0aa9_c1d8d8e1375e4699bcf299541dec3d7d.pdf
    • https://static.usrfiles.com/ugd/b85eb0_2a4207d6d0794d36af32c691e8796811.pdf
    • https://static.usrfiles.com/ugd/b8c837_854749b94cf34baca9ab932ae6fd90a9.pdf
    • https://cdn.shopify.com/s/files/1/0439/7580/3038/files/landing_page_bootstrap_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/0976/8604/files/chemistry_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0440/9055/6568/files/88073048581.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_off0000863f.bin
954155e35c16df97f205ed288a93c6ff3ee438775f5c72c4340ab5a92a7eb681
pdf-font-stream PDF embedded font (sfnt) at offset 0x863F 5524 bytes
font_01_sfnt_off000098ed.bin
c0e65ffc827a7a14b25301e74bef2ff64b498dd9a95bc03306f3a3b9441e0593
pdf-font-stream PDF embedded font (sfnt) at offset 0x98ED 10340 bytes