Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bee9a193989361a…

MALICIOUS

PDF

41.1 KB Created: 2020-08-19 22:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 243a307d624682c0129e6420a7fd4ab2 SHA-1: 9622d920bab33f12af0f637867e19c724e989440 SHA-256: 3bee9a193989361a6099b4f49c6aa75781f18a77e7dfb6bc42b9c80912d3adb0
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector link to 'ttraff.com'. The document body, though partially corrupted, includes this URL and references to 'wkhtmltopdf', suggesting it's a generated document. The presence of a link farm and a malicious redirector strongly indicates an attempt to lure users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of direct payload execution.

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=antipasti+veloci+con+pasta+sfoglia+e+formaggio
    • http://files.aipdc.org/uploads/1/3/1/3/131398532/zotodonigeviba_levorabumup_warelukukurebu.pdf
    • http://files.fauxmesticgoddess.com/uploads/1/3/1/8/131856381/gevaxil.pdf
    • http://files.theconsummateathlete.tssathletics.com/uploads/1/3/1/1/131163667/lepovefiwom.pdf
    • https://cdn.shopify.com/s/files/1/0435/6807/0815/files/restaurant_action_plan.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/1658908789.pdf
    • https://cdn.shopify.com/s/files/1/0431/7904/9121/files/apa_citation_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0435/2576/7327/files/66685469838.pdf
    • https://cdn.shopify.com/s/files/1/0436/9324/4570/files/tecumseh_engine_parts_diagram_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/4470/9276/files/mathematics_questions_and_answers_grade_12.pdf
    • https://cdn.shopify.com/s/files/1/0430/6547/5229/files/3283864698.pdf
    • https://cdn.shopify.com/s/files/1/0451/8828/4565/files/german_english_dictionary_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/0581/1608/files/fisalipo.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_off0000621c.bin
a9d6712d0392dff0b4fbfb1db79ae68bc992e323ac64557bfbe4d00a5b12b059
pdf-font-stream PDF embedded font (sfnt) at offset 0x621C 5384 bytes
font_01_sfnt_off00007458.bin
5e2340d32179daca1665d37cc31b695fe41bd13c4f30751306ef14100cf45284
pdf-font-stream PDF embedded font (sfnt) at offset 0x7458 10916 bytes