Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed86b573c565ceca…

MALICIOUS

PDF

85.4 KB Created: 2020-09-07 21:18:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25a340d8e80aecf9f0319fea503414fe SHA-1: 7f946099aa60de4ef6156082865624b3105df099 SHA-256: ed86b573c565ceca3bc2379b0f65e8754c38ce1efa904f55dd0118bf23ed816b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.club/wix?keyword=chloroforms+in+water'. Additionally, another critical heuristic indicates a PDF link farm, with many links hosted on cdn.shopify.com, suggesting an attempt to obscure the true malicious destination. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text but includes the malicious URL, reinforcing the lure.

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.club/wix?keyword=chloroforms+in+water
    • https://cdn.shopify.com/s/files/1/0435/2930/6263/files/39348881382.pdf
    • https://cdn.shopify.com/s/files/1/0440/7299/2918/files/91273741963.pdf
    • https://cdn.shopify.com/s/files/1/0432/0103/6443/files/avancemos_2_leccion_preliminar.pdf
    • https://cdn.shopify.com/s/files/1/0428/3452/6375/files/95701331212.pdf
    • https://cdn.shopify.com/s/files/1/0430/8906/8185/files/is_100_exam_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/cycling_helmet_size_guide_uk.pdf
    • https://cdn.shopify.com/s/files/1/0438/2906/7938/files/95846861829.pdf
    • https://cdn.shopify.com/s/files/1/0435/7550/9155/files/fuzunozuweberi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0743/3125/files/alphabet_letter_writing_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0435/4038/1855/files/the_caliphate_of_banu_umayyah.pdf
    • https://cdn.shopify.com/s/files/1/0434/8005/5958/files/9822691968.pdf
    • https://cdn.shopify.com/s/files/1/0429/3351/8489/files/42632865702.pdf
    • https://cdn.shopify.com/s/files/1/0431/9336/8725/files/24224251381.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e521.bin
b9c1bd2281f23f09d905494077011cda678d8ff8a20e62f41a46584ce81a564d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE521 6492 bytes
font_01_sfnt_off0000f556.bin
399c26458a601749209cfdf14bdc508d6576a1414ee5d397c9e04f3269145417		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF556 4912 bytes
font_02_sfnt_off000105ea.bin
0bdc287037eed04ce6064d20450dae3d29f4e431a122ac93392fc226be3ac8b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105EA 16712 bytes
font_03_sfnt_off00013a28.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A28 4324 bytes

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