Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ba8f6a62454841…

MALICIOUS

PDF

42.1 KB Created: 2020-08-05 23:02:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a0bc599757a5fb598f1e764a8f73440 SHA-1: 8208fdc89f260bd6fb19d6826dcd53fa98a560e8 SHA-256: 75ba8f6a62454841787609e9013a3430357ef474ccc1a26a10d63aa5f7091f0d
194 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One prominent link, 'https://ttraff.cc/pify?keyword=allstate+home+insurance+policy+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Allstate home insurance policy pdf', suggesting a lure to trick users into clicking the malicious link. The presence of numerous links and the identified malicious redirector indicate a likely attempt to lead users to malicious infrastructure.

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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.cc/pify?keyword=allstate+home+insurance+policy+pdf
    • http://files.zmagazine.co/uploads/1/3/1/6/131607010/zefimo.pdf
    • http://files.dougjthomas.net/uploads/1/3/1/4/131437886/7074180.pdf
    • http://files.grpastors.org/uploads/1/3/0/7/130739806/zesaxovuvorafizuje.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2458/7672/files/fibegavixexuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/2084/5210/files/52886250728.pdf
    • https://cdn.shopify.com/s/files/1/0432/6830/9152/files/tamunina.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/sovodetadigonujunavapa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0996/6239/files/82792159139.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1480/files/nipagunenafukevetoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0868/7269/files/52353983321.pdf
    • https://cdn.shopify.com/s/files/1/0434/3260/7894/files/diwirosugotasuwe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6255/8874/files/javive.pdf
    • https://cdn.shopify.com/s/files/1/0440/9311/2472/files/tasaxuxele.pdf
    • https://cdn.shopify.com/s/files/1/0434/3565/5335/files/espn_scoreboard_ncaa_basketball.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_off00006612.bin
c93d621ca0f6af16696128e87471c98755ac4ca353e621ff724391296de0f7c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6612 5484 bytes
font_01_sfnt_off00007898.bin
35cd0546a5ceed94effe74ca011d6e87b2a9bf1340650ea0d821a323c4302d61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7898 10340 bytes

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