Malicious PDF — malware analysis report

Static analysis result for SHA-256 e62e250c4a38e4f1…

MALICIOUS

PDF

34.9 KB Created: 2020-08-21 12:18:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2bd464550e03019c22201de5a8d30a2 SHA-1: 5efa4554b6c9e9ae63379973d780b0947752f4c7 SHA-256: e62e250c4a38e4f16d1976729bf935b159bdcdc9d0ba5ed2e39df36f60c56e47
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for a 'Tamil movie agathiyar full movie free'. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=tamil+movie+agathiyar+full+movie+free
    • http://vavuwe.consuelojunderwood.com/uploads/1/3/1/6/131607131/fanodokavepana-vafojikafesok-pitajil.pdf
    • http://files.20milesaday.com/uploads/1/3/0/7/130738837/81b5b70cc.pdf
    • http://files.mammalcommunicationlab.com/uploads/1/3/2/8/132815015/9634393.pdf
    • https://cdn.shopify.com/s/files/1/0432/4327/4395/files/difference_between_centroid_and_centre_of_gravity.pdf
    • https://cdn.shopify.com/s/files/1/0433/7932/7137/files/auditing_assurance_services_7e.pdf
    • https://cdn.shopify.com/s/files/1/0430/7373/2768/files/learn_arabic_language_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/4183/2615/files/1838953692.pdf
    • https://cdn.shopify.com/s/files/1/0431/7301/9797/files/new_bollywood_movies_hd_filmyzilla.pdf
    • https://cdn.shopify.com/s/files/1/0432/7977/7945/files/oxford_word_skills_idioms_and_phrasal_verbs_basic.pdf
    • https://cdn.shopify.com/s/files/1/0434/7750/0056/files/bobusududilefubo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6984/0283/files/seismic_isolation_devices_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/0236/3045/files/15492521343.pdf
    • https://cdn.shopify.com/s/files/1/0452/8862/0194/files/amsterdam_dance_event_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/3399/2085/files/uber_company_presentation.pdf
    • https://cdn.shopify.com/s/files/1/0433/3151/8622/files/33827244787.pdf
    • https://cdn.shopify.com/s/files/1/0429/2119/7724/files/negative_formal_command_venir.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_off00004a45.bin
c8a23323d492426d24ce71392a25dd13611dbdb151e6beda896fd5020cd4ea00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A45 5112 bytes
font_01_sfnt_off00005b9c.bin
3b88dd7e1da43a19c1a43a4b70807323e101ae578c5e9cbac8a43b733f287612		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9C 10236 bytes

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