Malicious PDF — malware analysis report

Static analysis result for SHA-256 498557ebdb5e096b…

MALICIOUS

PDF

37.1 KB Created: 2020-08-01 18:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0260c4e37b2de9b09be1064449a37972 SHA-1: 43a6cf9d92024102e29c4a5b0b90858f6f2e3cd2 SHA-256: 498557ebdb5e096b70e6313268cc6378d367b6e2621dbffbd692a4dae62af540
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically the URL https://ttraff.cc/pify?keyword=formatar+s3+mini. This indicates a phishing or redirection attack. The presence of numerous links to benign Shopify domains suggests an attempt to obscure the malicious redirector within a larger, seemingly legitimate link farm. No scripts were extracted from this sample.

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.cc/pify?keyword=formatar+s3+mini
    • http://files.sswonline.com/uploads/1/3/0/8/130813757/6073405.pdf
    • http://files.napervillebigbandjazzfestival.com/uploads/1/3/1/1/131163914/tanijof_bafesuwovenuzad_kurafale.pdf
    • http://files.salisburyroversfc.co.uk/uploads/1/3/1/4/131453805/d7a439e04a5.pdf
    • http://files.tatterspanish.com/uploads/1/3/2/7/132712006/fimavorimekakikawu.pdf
    • https://cdn.shopify.com/s/files/1/0438/8388/8808/files/mobabawofipekonavopemotik.pdf
    • https://cdn.shopify.com/s/files/1/0429/1916/6105/files/83839986642.pdf
    • https://cdn.shopify.com/s/files/1/0431/2452/3169/files/80943692663.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gidawibozifuniji.pdf
    • https://cdn.shopify.com/s/files/1/0431/5987/9841/files/73338241370.pdf
    • https://cdn.shopify.com/s/files/1/0428/2328/6940/files/33889392962.pdf
    • https://cdn.shopify.com/s/files/1/0432/3645/8654/files/fiwovefesiperamubufu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/linod.pdf
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/wodivonatifolu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4398/6327/files/80281540030.pdf
    • https://cdn.shopify.com/s/files/1/0430/8818/3456/files/voguvadulaxelivalebisoti.pdf
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/4127356231.pdf
    • https://cdn.shopify.com/s/files/1/0434/4987/6630/files/guwexosisexumuza.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_off00005522.bin
51ab5d21c8c7a2bb678bb66b42e4f373f57fbd01fd24d099b6f6f86cea569971		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5522 4916 bytes
font_01_sfnt_off000065c1.bin
23ec3d5aa4e504c070f92e89e7447e70c704bf918fbbadc9f04113c0ef2aa310		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65C1 9940 bytes

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