Malicious PDF — malware analysis report

Static analysis result for SHA-256 55050093003f5448…

MALICIOUS

PDF

44.4 KB Created: 2020-08-18 19:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd08471c527b0c62eca31d248275db79 SHA-1: 52545d4e64776638d64bd5b1ddf40defff98d666 SHA-256: 55050093003f5448031ab4c8781103b930c5936d0459250e753002fc2c27d238
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at https://ttraff.com/pify?keyword=twitter+video+format+specs. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to "Twitter video format specs". The ML classifier strongly supports the malicious nature of this PDF, indicating it's designed to redirect users to harmful content.

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=twitter+video+format+specs
    • http://files.scdtheatre.org/uploads/1/3/0/7/130738641/wafijemogebijozixe.pdf
    • http://files.aspontaneoustraveler.com/uploads/1/3/0/8/130874655/1005292.pdf
    • https://cdn.shopify.com/s/files/1/0434/3198/5309/files/jubilate_deo_cantate_domino.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/86200975461.pdf
    • https://cdn.shopify.com/s/files/1/0441/0084/5720/files/42113502941.pdf
    • https://cdn.shopify.com/s/files/1/0431/4667/4336/files/60107980938.pdf
    • https://cdn.shopify.com/s/files/1/0431/3248/5793/files/96340999249.pdf
    • https://cdn.shopify.com/s/files/1/0433/0268/2789/files/13252861124.pdf
    • https://cdn.shopify.com/s/files/1/0437/3171/4199/files/gekoximaburotipobotirawo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1776/files/puzuwagarekewogipabowo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6127/1959/files/azulfin_500mg_bula.pdf
    • https://cdn.shopify.com/s/files/1/0436/4759/8742/files/40089827757.pdf
    • https://cdn.shopify.com/s/files/1/0437/0835/0615/files/21121168239.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f61.bin
a2d38593c00cd11ea1872985eccbd27a82e344d84a46dd78b5177adf3b63f259
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F61 5372 bytes
font_01_sfnt_off000081a3.bin
60e7af11bbf4c8626c3ab6dee07ca8be85f20d52a5960e6bc6cbaa139b0c6186
pdf-font-stream PDF embedded font (sfnt) at offset 0x81A3 10336 bytes