Malicious PDF — malware analysis report

Static analysis result for SHA-256 78be04223393d414…

MALICIOUS

PDF

46.0 KB Created: 2020-08-16 22:29:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 491079e17dd0d603588ea176fc2ac80e SHA-1: 4051460d3adf24a9fabb0ddaddd6b2c175fd2d32 SHA-256: 78be04223393d4149b69a0088c05e2bda25f485523f1bfe87001667d1d543a42
154 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a redirector service, which is a common tactic for distributing malware or phishing content. The document body, though heavily obfuscated, contains text suggesting a lure related to a movie download, aiming to trick users into clicking the malicious link. The ML classifier strongly indicated maliciousness, supporting the assessment of a malicious redirector.

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.cc/pify?keyword=accused+no+1+full+movie++tamilrockers
    • http://tovevib.odriscollcollective.com/uploads/1/3/1/3/131397970/mejuraseki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0430/7877/9029/files/70713291083.pdf
    • https://cdn.shopify.com/s/files/1/0432/3039/6574/files/guwosodesezijimu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6671/2479/files/beginner_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/7257/6922/files/10343538760.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/75887564082.pdf
    • https://cdn.shopify.com/s/files/1/0429/2942/2499/files/nizadazel.pdf
    • https://cdn.shopify.com/s/files/1/0439/4788/4699/files/49530650896.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84770620138.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94229011204.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006169.bin
b734c954b47d81135cdb6a31647f9f18e88d006654e030479a0b9e662799ecba
pdf-font-stream PDF embedded font (sfnt) at offset 0x6169 5332 bytes
font_01_sfnt_off00007377.bin
0ffa820a8b85a49d7b01436f9cae03df3fe52846fc062e8e89494ad018dc3471
pdf-font-stream PDF embedded font (sfnt) at offset 0x7377 7188 bytes
font_02_sfnt_off000087e4.bin
5d7cd43a714f002d7b4fdfeb8e01a907e8a2e315126e124b890b2d5866401458
pdf-font-stream PDF embedded font (sfnt) at offset 0x87E4 10172 bytes