Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf12617ad7b7b1d…

MALICIOUS

PDF

48.6 KB Created: 2020-08-04 18:44:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fd543de49c574fe119e42533039a7d3 SHA-1: 6aedb69e9581f4d18f1bd7c53856e2df7fb7295b SHA-256: abf12617ad7b7b1d0e13dcbe9458a0ed612dc2031abfce98945e2b055aeeda11
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, many pointing to Shopify domains hosting PDF files, and a critical redirector link to ttraff.cc. This indicates a link farm or redirection scheme designed to obscure the ultimate destination. The presence of a malicious redirector suggests the intent is to lead the user to a malicious site, likely for phishing or malware delivery. No scripts were extracted, but the PDF structure and link farm heuristics strongly suggest a 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=benjamin+graham+intelligent+investor+book+pdf
    • http://files.yongintaekwondocollege.com/uploads/1/3/0/8/130814980/2644989.pdf
    • http://files.naturallymaineskincare.com/uploads/1/3/1/3/131398598/motaripilaset.pdf
    • http://files.michelehd.com/uploads/1/3/1/3/131378943/juroriwadosegarotazu.pdf
    • http://files.shelbystangatreasures.com/uploads/1/3/1/3/131398143/nuwepanomov.pdf
    • http://files.simplyscrunchyeg.com/uploads/1/3/0/8/130813991/dapipevixegagilusij.pdf
    • https://cdn.shopify.com/s/files/1/0434/6635/8934/files/6056733497.pdf
    • https://cdn.shopify.com/s/files/1/0434/2104/0792/files/the_complete_glock_reference_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/20367987374.pdf
    • https://cdn.shopify.com/s/files/1/0434/1402/8450/files/77497098006.pdf
    • https://cdn.shopify.com/s/files/1/0432/5199/0691/files/22932733230.pdf
    • https://cdn.shopify.com/s/files/1/0429/5471/9395/files/kitoborujosenijizapuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2995/files/93675371593.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5316/files/litikunuwuwugi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1278/files/42223411994.pdf
    • https://cdn.shopify.com/s/files/1/0434/2104/0792/files/veluwezefivusigor.pdf
    • https://cdn.shopify.com/s/files/1/0431/2819/3184/files/19064182519.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/90243225538.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_off00007937.bin
0a9e378f16fdf8f0e2f9bb90470a3802d099d5e76a688b28f424c5f384797af4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7937 5844 bytes
font_01_sfnt_off00008d01.bin
aa0a7721d02a242adcca9ddf14c7cf86801ec099b710e3c93c67b25ce486e25d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D01 13816 bytes

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