Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e17bc5b1d8dcb2c…

MALICIOUS

PDF

47.2 KB Created: 2020-08-28 03:13:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d52ed1f31f33383a5f9dd32cfdeac4d0 SHA-1: 5757d84a83f575364ad7e7c0545022ae606f6846 SHA-256: 7e17bc5b1d8dcb2cfb8fdb757bf62f207d674e4e4c21318591c2df36c973a3a8
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm, with the primary redirector URL being https://ttraff.ru/pify?keyword=dana+gioia+can+poetry+matter. This indicates a likely attempt to lure users to malicious sites. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/pify?keyword=dana+gioia+can+poetry+matter
    • http://files.kmcphersonpoet.com/uploads/1/3/1/4/131454352/2862659.pdf
    • http://files.firstathens.org/uploads/1/3/2/7/132710687/9347935.pdf
    • http://files.peacocksprettys.net/uploads/1/3/1/3/131380641/razek.pdf
    • https://cdn.shopify.com/s/files/1/0433/0261/7252/files/53594564328.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0309/files/zagifol.pdf
    • https://cdn.shopify.com/s/files/1/0446/5927/7987/files/alif_laila_ki_kahani_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3845/7508/files/zulivenimozujege.pdf
    • https://cdn.shopify.com/s/files/1/0435/7039/7352/files/84391171650.pdf
    • https://cdn.shopify.com/s/files/1/0431/4526/5318/files/jakufagafejexi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8941/8657/files/sukeviwizi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8072/8224/files/ropejozuxokab.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/31583745832.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/59771881901.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_off00007b4a.bin
2469ef389550082a24484b4cd53d0f121e9718926d57f1866909f7ab06f1ff2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B4A 5144 bytes
font_01_sfnt_off00008cc3.bin
62f12cd06249cac4e110e879082c3cb7c1d4232b6424f2b8df8d2539693bad2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC3 10368 bytes

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