Malicious PDF — malware analysis report

Static analysis result for SHA-256 675e5e02936b5e4b…

MALICIOUS

PDF

44.7 KB Created: 2020-08-06 21:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2de970efc0734ac3aa08f8021b0d69d7 SHA-1: dab6e5935fe53e87c88bbac972966768b21bf095 SHA-256: 675e5e02936b5e4be8e604acd6a093353042cb876f3b0798633a88bd1a0d7ff5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one identified as a malicious redirector pointing to 'ttraff.com'. The document body, though partially obfuscated, includes text related to 'Google classroom basics for teachers pdf', suggesting a lure. The presence of a link farm and a critical heuristic firing for a malicious redirector indicates a high likelihood of this document being used for phishing or malware distribution.

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=google+classroom+basics+for+teachers+pdf
    • http://files.solerconsulting.com/uploads/1/3/2/6/132696015/xuxugiguvo.pdf
    • http://files.johannes-keller.net/uploads/1/3/1/4/131453429/3696935.pdf
    • http://files.sailingsteadfast.com/uploads/1/3/1/3/131398377/fodijojotirowos.pdf
    • http://monumed.powerbodyfitnessinc.com/uploads/1/3/2/7/132710797/kerudo-bawofoguki-rikodexaf-reveresudamejo.pdf
    • http://bakale.bercgroup.com/uploads/1/3/1/3/131398140/nukitafu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/96266364980.pdf
    • https://cdn.shopify.com/s/files/1/0434/0056/0805/files/58717957301.pdf
    • https://cdn.shopify.com/s/files/1/0434/4587/8950/files/penotuwasorofinomu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3349/1606/files/mupetefe.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/19550710893.pdf
    • https://cdn.shopify.com/s/files/1/0437/6094/3258/files/78934239691.pdf
    • https://cdn.shopify.com/s/files/1/0437/3502/3770/files/all_body_beast_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4042/files/vedivivome.pdf
    • https://cdn.shopify.com/s/files/1/0428/3262/5831/files/cyberlink_media_suite_essentials.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/lonubawejaf.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_off00006179.bin
522ab0d182d4fc2a56e358b426273b159c0e9dca8d2e6b8c47b1e18ac622daf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6179 5420 bytes
font_01_sfnt_off000073e2.bin
b0689cd706bee5742abd487bd09f0a6d8502691e2518750248316ef272529bfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E2 10460 bytes
font_02_sfnt_off000097b3.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97B3 4324 bytes

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