Malicious PDF — malware analysis report

Static analysis result for SHA-256 592aabd6b6d1fa4e…

MALICIOUS

PDF

36.7 KB Created: 2020-08-08 00:26:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9cf2416503f645e314146ee63cc1c95 SHA-1: 49dfb4f8a3fdc4bd5ef35852d79b865e32a91c0c SHA-256: 592aabd6b6d1fa4e46e90b975846be15aef1d9d4a9ce640aede56315a65716ba
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.cc/pify?keyword=can+you+feel+the+love+tonight+piano+sheet+pdf+free`. This indicates the document's primary purpose is to redirect users to potentially harmful content. The PDF also contains a large number of external links, many hosted on `cdn.shopify.com`, suggesting a link farm or SEO manipulation tactic to increase visibility. No scripts were extracted, but the presence of the malicious redirector is sufficient evidence of malicious intent.

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=can+you+feel+the+love+tonight+piano+sheet+pdf+free
    • http://files.mariamirojohnson.com/uploads/1/3/1/4/131483275/sefeg-zupobuzi-wibatajudozif.pdf
    • http://files.jassiewassy.com/uploads/1/3/1/0/131071166/b219ce4020.pdf
    • http://jutalij.antiquefairscornwall.co.uk/uploads/1/3/0/7/130776445/zumibotukivas-xajepapufex-solasobegux-wejufuwuziza.pdf
    • http://files.ellingwoodsoap.com/uploads/1/3/1/3/131379578/bimefux.pdf
    • https://cdn.shopify.com/s/files/1/0436/5336/5910/files/votiven.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/aws_certification_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/3416/4893/files/63647758859.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/37249621548.pdf
    • https://cdn.shopify.com/s/files/1/0438/2828/1506/files/how_to_start_a_business_without_any_money.pdf
    • https://cdn.shopify.com/s/files/1/0432/7990/9028/files/98819843097.pdf
    • https://cdn.shopify.com/s/files/1/0427/5775/0951/files/lizuluba.pdf
    • https://cdn.shopify.com/s/files/1/0434/9617/7816/files/tia_942.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/78230883448.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/test_1879eb6a-339e-4d45-a409-571cd94a4742.pdf?v=1594212285
    • https://cdn.shopify.com/s/files/1/0433/9387/6118/files/blueprint_sample.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/zofad.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050b1.bin
c866dc678dc9fa853a85608a4ce4fa1be061e38e723781e11a74e0314d89e01d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50B1 5372 bytes
font_01_sfnt_off00006301.bin
e9751e726b379caf2f09bcc590b980290d8762994dc2f91a0edaa698e9a86d96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6301 10112 bytes

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