Malicious PDF — malware analysis report

Static analysis result for SHA-256 afac646868509493…

MALICIOUS

PDF

44.7 KB Created: 2020-08-03 05:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99d3cf34bd5072b4ccf7a89f4023f8fc SHA-1: 4824869ab1af660cdbbf40965294d99ea5dc20eb SHA-256: afac6468685094935db5f05c7503e9cda7210a9435cbff28be94f0a9aaff6241
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The embedded URLs, particularly the one pointing to ttraff.ru, are likely part of a campaign to drive traffic to malicious sites or engage in SEO spam. No scripts were extracted, limiting the analysis of direct payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=husqvarna+yth2348+parts
    • http://files.discoversynergy.com/uploads/1/3/1/4/131453527/davelefirivokimepexa.pdf
    • http://files.ceramics.se/uploads/1/3/1/3/131381109/bejirupukok-fifitowipuxor-legir.pdf
    • http://files.gffmi.org/uploads/1/3/1/4/131407424/6946335.pdf
    • http://files.ccaspenyouth.com/uploads/1/3/1/0/131071114/lekumubebebi-luxeporarenaka.pdf
    • http://files.kavehbagherimd.net/uploads/1/3/2/6/132695455/7006697.pdf
    • https://cdn.shopify.com/s/files/1/0433/9305/6933/files/ap_amumu_build.pdf
    • https://cdn.shopify.com/s/files/1/0433/6916/9045/files/famuta.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/nirumalinoresumuvapijari.pdf
    • https://cdn.shopify.com/s/files/1/0430/0197/0837/files/21408107228.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/danukokosiku.pdf
    • https://cdn.shopify.com/s/files/1/0430/0380/5847/files/97943262727.pdf
    • https://cdn.shopify.com/s/files/1/0438/2811/7661/files/77853123.pdf
    • https://cdn.shopify.com/s/files/1/0431/7878/6965/files/folawizapexidijo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4671/5040/files/nevafefafukulagutero.pdf
    • https://cdn.shopify.com/s/files/1/0439/2583/1835/files/vibotugivube.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_off00006797.bin
e498128ba7bbbfae0150fc4a399cfc915e3a4f9e09a09ec6a54b1001b3c16060		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6797 5704 bytes
font_01_sfnt_off00007b14.bin
8c20340b6f41156c37c71f0c0aa2a174655f1f301165f69b73f88b64618a1350		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B14 13652 bytes

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