Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b57210b9a136071…

MALICIOUS

PDF

122.0 KB Created: 2020-08-02 10:44:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ca51bc5fd6b4fee53fa74a3787e6ed3 SHA-1: c85fc36b7b90577bac092be547248f0897b8e484 SHA-256: 5b57210b9a1360716a1a9b0fba10aec40a7cb76d7c83292d602a6258f50d0782
174 Risk Score

Malware Insights

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

The PDF contains a link disguised as a "Samsung microwave manual" that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document also features a large number of external PDF links, suggesting a link farm for SEO manipulation or traffic redirection. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the redirector heuristic suggest an attempt to deliver a malicious payload or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.cc/pify?keyword=samsung+microwave+manual
    • http://files.jamestrankina.com/uploads/1/3/1/4/131437615/6edc24.pdf
    • http://files.mylenebaxterconsulting.com/uploads/1/3/1/3/131380126/d30d4630138ca18.pdf
    • http://files.lizziehobbs.co.uk/uploads/1/3/0/8/130814043/jefeboromumuw-kanaruzewu-tamexuwinerop-xotewikebezuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1483/1780/files/85403953593.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7660/files/12882243690.pdf
    • https://cdn.shopify.com/s/files/1/0431/8278/4676/files/dimuzejabixujatiwusun.pdf
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/fiwofelixuwoziporanuli.pdf
    • https://cdn.shopify.com/s/files/1/0434/0577/0904/files/23971657847.pdf
    • https://cdn.shopify.com/s/files/1/0431/3559/8758/files/93368881298.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9841/files/fetekedemubotema.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/botudurodakokebavexosox.pdf
    • https://cdn.shopify.com/s/files/1/0429/0864/7580/files/wasigaragesodiwevuli.pdf
    • https://cdn.shopify.com/s/files/1/0435/1341/3786/files/vabanotosawe.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/tituzamajufovuvoxekixumu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/synapse_roblox_website.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_off00019536.bin
dafccb1b8a1d2512153d99a7f4e5ffae5256c62cf9084ba031b60f09975e0dca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19536 5372 bytes
font_01_sfnt_off0001a779.bin
9efe88b24060cfff5cb825524bf7788ab9fe66d9e63461bf588d19acb21dd516		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A779 16652 bytes

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