Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f744e41fcfc775d…

MALICIOUS

PDF

41.7 KB Created: 2020-08-20 20:24:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36ad3644c923d121a69532115631a756 SHA-1: 7645e2929545aa76866d3dd2661865e5a568455b SHA-256: 2f744e41fcfc775d655c29cc153c4d760e371a7371016469091653b246e17f30
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=arrival+guides+florence'. Another critical heuristic identified a PDF link farm, suggesting an attempt to manipulate search engine results or distribute content broadly. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted from this sample, but the presence of malicious redirector links and a link farm points towards a phishing or malware distribution attempt.

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=arrival+guides+florence
    • http://files.wildparrotsupclose.com/uploads/1/3/0/7/130775590/306a4fe.pdf
    • http://muzojenu.coachfreiscience.com/uploads/1/3/0/7/130776760/suwejavoritodop.pdf
    • http://files.acfcrawford.com/uploads/1/3/1/3/131384660/juzisebazopix-wanozexoki-derogedenaxezu-sokuzi.pdf
    • http://xiluwefan.oikstrategy.com/uploads/1/3/1/6/131637881/fusilatew.pdf
    • https://cdn.shopify.com/s/files/1/0435/9720/1567/files/learn_german_with_stories_caf_in_berlin_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5290/0250/files/42433491360.pdf
    • https://cdn.shopify.com/s/files/1/0436/2685/6601/files/class_d_amplifier_repair.pdf
    • https://cdn.shopify.com/s/files/1/0432/9232/8102/files/vomefusepo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2308/0344/files/zindagi_bajrangi_bhaijaan_song_pagalworld.pdf
    • https://cdn.shopify.com/s/files/1/0435/4516/5976/files/7539623643.pdf
    • https://cdn.shopify.com/s/files/1/0432/7663/2220/files/acs_breast_cancer_screening_guidelines_2019.pdf
    • https://cdn.shopify.com/s/files/1/0440/3773/4550/files/sijuposet.pdf
    • https://cdn.shopify.com/s/files/1/0431/1446/3394/files/41273992440.pdf
    • https://cdn.shopify.com/s/files/1/0437/4816/3735/files/fefekizivadami.pdf
    • https://cdn.shopify.com/s/files/1/0433/7346/1669/files/pre_algebra_tests.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_off00006480.bin
f1e5a46970c5c0f1e5008d0375dd595207adbd4dca4bec94851906539643a421		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6480 5236 bytes
font_01_sfnt_off00007662.bin
14110a713dc169be73a2c9b2327b6af0d1e72c931a1f0b0aee0c8a6b78077a6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7662 10440 bytes

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