Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f597226504a6613…

MALICIOUS

PDF

129.5 KB Created: 2020-08-17 07:23:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0006e32f3fc115400c43cf839b0da347 SHA-1: 80bc78cbd5c0825fab1f42d2a99b0e3e18d14eb2 SHA-256: 6f597226504a661311a42a8cd53131b59059d138c789f21e702e6c3f67ee2304
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector link farm. The primary malicious URL, 'https://ttraff.com/pify?keyword=broken+heart+english+song+free', is presented within the document body, disguised as a song download. This indicates a phishing or malware distribution attempt, leveraging social engineering to entice users to click the malicious link.

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=broken+heart+english+song+free
    • http://zekekuda.sebaacademyschool.com/uploads/1/3/0/8/130874284/ade742117b0426.pdf
    • http://files.asapbwh.org/uploads/1/3/1/4/131483955/4234064.pdf
    • http://files.emeraldis.org/uploads/1/3/1/4/131483662/5536309.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3188/8035/files/sobuvekivu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3929/2577/files/free_40th_birthday_email_invitation_templates.pdf
    • https://cdn.shopify.com/s/files/1/0438/0193/6033/files/sql_technical_interview_questions_and_answers_for_freshers.pdf
    • https://cdn.shopify.com/s/files/1/0429/0707/4723/files/16866494254.pdf
    • https://cdn.shopify.com/s/files/1/0431/7344/5788/files/learn_japanese_alphabet.pdf
    • https://cdn.shopify.com/s/files/1/0440/7692/5078/files/network_tool_linux.pdf
    • https://cdn.shopify.com/s/files/1/0433/3810/5000/files/76159670274.pdf
    • https://cdn.shopify.com/s/files/1/0429/8607/8369/files/3575625977.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/medarovadujagowurevasote.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_off0001bb5e.bin
96b29a3277dcb4bda74d931ff50da74e49e46a8b428c49aa260ee77cd456777f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB5E 5144 bytes
font_01_sfnt_off0001ccd5.bin
b7d374eeac9ada6c7e6bf636f406220cb5f0e699a43d0f57d8ebc9a4cd3330d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1CCD5 14136 bytes