Malicious PDF — malware analysis report

Static analysis result for SHA-256 5610997cdd51a44e…

MALICIOUS

PDF

49.0 KB Created: 2020-08-14 18:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 201e05c61d68e53af4d235bbb888a434 SHA-1: 7b026a7555fd87cf256f1539faecd4f36ae29ac3 SHA-256: 5610997cdd51a44e79a2e8f1021de4e1d95c57770e5288d84ca1e1552fc9d35b
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests the document is part of a link farm or SEO manipulation scheme designed to drive traffic to malicious infrastructure. 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=mapa+barrios+de+madrid+pdf
    • http://files.granitestaterunningcamp.com/uploads/1/3/1/3/131379951/fofopapaso.pdf
    • http://files.alphaesqcleveland.com/uploads/1/3/1/4/131437535/43b4a4fc5dd235c.pdf
    • http://noxud.tenderlovingcarechildcarecenters.com/uploads/1/3/0/7/130776485/dapol_vaxeruwufetigu_soxaxi_bufeliv.pdf
    • http://files.nrityayogsutra.com/uploads/1/3/2/6/132682934/lirakozirofun.pdf
    • http://files.lkhardware.com/uploads/1/3/0/7/130776661/157f1d.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3336/files/11217691222.pdf
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/fluke_115_multimeter_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/2017/3983/files/kazositobefatejejepa.pdf
    • https://cdn.shopify.com/s/files/1/0437/5488/1185/files/void_visualizer_corsair.pdf
    • https://cdn.shopify.com/s/files/1/0435/7446/0579/files/begikexevusifenuridexosos.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2255/files/28925189288.pdf
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/damubodom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18396470220.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_off000073bb.bin
a7fb52533efc9003b4f25df00b0e2588faef71ac246173fe854fd67195cab7aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x73BB 4904 bytes
font_01_sfnt_off0000845b.bin
7e34bfa8968782f68160a85e7d285b51c8097e158859a08e7514ba12f397e5b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x845B 10916 bytes
font_02_sfnt_off0000a7f5.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xA7F5 4324 bytes