Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7d719f910817263…

MALICIOUS

PDF

47.9 KB Created: 2020-08-20 00:00:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 305db29e91833609633b181808056218 SHA-1: 0940acf79b0047183edd67531c62560f3055fb65 SHA-256: c7d719f9108172633a2c63400ae725c098fe26394e1d82108aa2199dd1d9a094
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, ttraff.cc. The document body, though partially corrupted, suggests a lure related to 'drawing comics book'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM strongly indicate a malicious intent to redirect users to harmful sites. The ML classifier also flagged this PDF with high confidence.

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=guide+to+drawing+comics+book
    • http://files.fairoakshostlionsclub.com/uploads/1/3/2/7/132740814/3507843.pdf
    • http://guwom.teachingconnections.net/uploads/1/3/0/7/130775565/890032644b3e291.pdf
    • http://files.shoprivervalley.com/uploads/1/3/0/9/130968984/7dfa7.pdf
    • https://cdn.shopify.com/s/files/1/0437/8044/0213/files/answer_to_g_s_secret_mission.pdf
    • https://cdn.shopify.com/s/files/1/0427/7560/9510/files/jagevedeniravuvoset.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/8772033183.pdf
    • https://cdn.shopify.com/s/files/1/0429/9928/3861/files/7069472785.pdf
    • https://cdn.shopify.com/s/files/1/0429/2670/2758/files/dugab.pdf
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/lasosikixidikavibawuzof.pdf
    • https://cdn.shopify.com/s/files/1/0437/4321/5767/files/kobefulo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2381/0211/files/spring_turkey_season_2016_ky.pdf
    • https://cdn.shopify.com/s/files/1/0438/5590/4918/files/holistic_marketing.pdf
    • https://cdn.shopify.com/s/files/1/0437/1903/2987/files/mini_corporate_identity_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0429/3486/1987/files/44673941387.pdf
    • https://cdn.shopify.com/s/files/1/0432/6414/7609/files/bhagavad_gita_chapter_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0429/5376/9123/files/nobodunakegum.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ecc.bin
345c7ed71945da1db7a4bd67cf956a59dc8c6e6187808958133e6649651ce670		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECC 5436 bytes
font_01_sfnt_off0000813e.bin
9d7c246a7b4158df27560f6630afc719b8a84888aa0cc5ee45cbe3ab38912a01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x813E 10420 bytes
font_02_sfnt_off0000a4ed.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4ED 4324 bytes

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