Malicious PDF — malware analysis report

Static analysis result for SHA-256 0660e55871fef858…

MALICIOUS

PDF

48.1 KB Created: 2020-08-30 04:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbe430b8fb5ea8e4f4b822f0e390d8b0 SHA-1: 00a09e3629faeeadcc5c12e22f298cfe67149714 SHA-256: 0660e55871fef858f9cfbc9f97261e22c795bca9e529ef18ea586e391bc02e6c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, many of which point to a link farm hosted on Shopify. One prominent link, 'https://ttraff.ru/wix?keyword=on+writing+college+application+essay+pdf', is identified as a malicious redirector. The document's structure and content suggest a phishing or scam attempt, leveraging SEO tactics to distribute malicious links.

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.ru/wix?keyword=on+writing+college+application+essay+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/9228/6363/files/vivabozisab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9635/9580/files/59057135623.pdf
    • https://cdn.shopify.com/s/files/1/0429/6038/8252/files/21398967816.pdf
    • https://cdn.shopify.com/s/files/1/0430/1357/0709/files/50002117432.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/98544869752.pdf
    • https://cdn.shopify.com/s/files/1/0437/0071/5674/files/17134354996.pdf
    • https://cdn.shopify.com/s/files/1/0431/9857/8848/files/67923299024.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/42365487118.pdf
    • https://cdn.shopify.com/s/files/1/0429/1582/3772/files/wurodatojoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/8794/6133/files/82357966464.pdf
    • https://static.usrfiles.com/ugd/4dd980_64166b4fae4d4acfadc5e30b40f4455d.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f47f62f9f354b58b6213d2f9cf468d6.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a3ae670a5fe4fddbc5ddde7e7f2dc8a.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_d71e9b1c91474af38074cddd1f67a0ad.pdf
    • https://cdn.shopify.com/s/files/1/0462/3961/3079/files/vitamin_b12_deficiency_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0431/6987/4082/files/95716883315.pdf
    • https://cdn.shopify.com/s/files/1/0433/8624/1187/files/17544419416.pdf
    • https://cdn.shopify.com/s/files/1/0434/2228/5976/files/turomurejirafopokukidip.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_off00007d93.bin
3073c727a4d8e78b59e1404ddf8a7df79c58c38d6ba00d94138376e0d8a3bc6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D93 5544 bytes
font_01_sfnt_off0000908b.bin
ff4fc0eea2de5c73b5c5d7fb958c220454e4848ebb3726f536a7366c1b04c3e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x908B 10204 bytes

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