Malicious PDF — malware analysis report

Static analysis result for SHA-256 07588b3e9634d061…

MALICIOUS

PDF

36.4 KB Created: 2020-08-29 19:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5209ebd63f3a274ff2d285942eeba0ab SHA-1: 9dcd32dde03f113c19b632d1ca406128395fef16 SHA-256: 07588b3e9634d06155f503e30b32112a6a01d04fa06b4a51f56025cdbfb0e6c1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which, https://ttraff.com/wix?keyword=what+a+wonderful+world+piano+sheet+music+pdf, is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous other Shopify links, some flagged as benign, indicates a potential link farm or SEO manipulation tactic to disguise the malicious URL. No scripts were extracted, but the PDF structure and malicious link strongly suggest a phishing or redirection attempt.

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/wix?keyword=what+a+wonderful+world+piano+sheet+music+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0128/1701/files/fnma_guidelines_future_income.pdf
    • https://cdn.shopify.com/s/files/1/0437/3518/7605/files/does_every_stronghold_have_an_end_portal.pdf
    • https://cdn.shopify.com/s/files/1/0432/7840/1700/files/lenovo_thinkpad_x390_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/50384282908.pdf
    • https://static.usrfiles.com/ugd/ab059d_91fd92a7cc04465b898ea564eb8524ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_2836a8e92f08439ca0e780a51e017d34.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/38755523729.pdf
    • https://cdn.shopify.com/s/files/1/0429/5199/9637/files/65541521737.pdf
    • https://cdn.shopify.com/s/files/1/0434/3103/5032/files/nisubukazawozu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/viraxesukevutexixujamuk.pdf
    • https://cdn.shopify.com/s/files/1/0435/5663/4785/files/80585011369.pdf
    • https://cdn.shopify.com/s/files/1/0433/5393/1944/files/ziwojilurek.pdf
    • https://cdn.shopify.com/s/files/1/0429/2067/3433/files/basic_english_grammar_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/voxaxuzipotomop.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e9f.bin
a2ea605596b774a82912f3e8f0fc6b8657104ee2ef5e119ee1a22609962301cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E9F 5500 bytes
font_01_sfnt_off0000613a.bin
8af9aee642af30c19aedead21c2e8b5cd782bc4c5731d45cf1ecbf0642c5762b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x613A 10292 bytes

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