Malicious PDF — malware analysis report

Static analysis result for SHA-256 e94eda74f6ca0934…

MALICIOUS

PDF

46.3 KB Created: 2020-08-01 14:20:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1aabf835fa0a1d83dec3e88fe3a344a0 SHA-1: f7a510e371c8f9482e3042ac933d7e99797c2784 SHA-256: e94eda74f6ca0934d448875e1304627e2678dd5e9c27fb0ecd7c2aedd5f637ac
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 'https://ttraff.com/pify?keyword=break+from+toronto'. Additionally, it features a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL and references to other PDF files, reinforcing the redirection and link farm findings.

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=break+from+toronto
    • http://files.hornehastingsgourmet.com/uploads/1/3/1/6/131637695/ca8a3566282ae0.pdf
    • http://files.eventinspire.com/uploads/1/3/1/6/131637273/delita.pdf
    • http://files.melrockworld.com/uploads/1/3/0/9/130969474/4697716.pdf
    • https://cdn.shopify.com/s/files/1/0428/6332/9446/files/takosogisafo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4830/4797/files/zilisuz.pdf
    • https://cdn.shopify.com/s/files/1/0439/5306/2043/files/zetusote.pdf
    • https://cdn.shopify.com/s/files/1/0437/2883/0632/files/duxaxerepabu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2163/0631/files/fidemoso.pdf
    • https://cdn.shopify.com/s/files/1/0432/2023/8503/files/90322002766.pdf
    • https://cdn.shopify.com/s/files/1/0432/0608/2717/files/xipirexizo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8434/8569/files/xigufefepobakusorijusemek.pdf
    • https://cdn.shopify.com/s/files/1/0440/5395/4710/files/revopenobutomakaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0727/0297/files/30978808540.pdf
    • https://cdn.shopify.com/s/files/1/0429/4855/9004/files/12451692107.pdf
    • https://cdn.shopify.com/s/files/1/0429/4872/2851/files/59428678613.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lovukapovilelogitolosir.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_off00006910.bin
98f09df94df04f644b8938f69f01d0b75a9e5ec7f741bebab7203fc490cc57f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6910 4556 bytes
font_01_sfnt_off00007868.bin
5d4dd04a0c62d4bae0b2a8bd9fc895b0ca711665a9b9b79066639fd8e4ca655c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7868 11104 bytes
font_02_sfnt_off00009e7a.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E7A 4324 bytes

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