Malicious PDF — malware analysis report

Static analysis result for SHA-256 b35aa0b34656425c…

MALICIOUS

PDF

43.9 KB Created: 2020-07-29 04:29:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c1e23b44a7f67d5ad577aaad3463d99 SHA-1: 6b68dafbb5f21ea60239c1399199165fe7fbaa44 SHA-256: b35aa0b34656425c97a0108dc9c828bb6ddfbbf903732e44b08e2acc50bb5872
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm. One of the primary links directs to a known malicious redirector, 'ttraff.ru', which is likely used to obscure the final destination or to perform further malicious actions. The ML classifier also strongly indicated maliciousness. No scripts were extracted, limiting the analysis of specific behaviors.

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=airplane+simulator+games+free++softonic
    • http://files.oakstreetpto.com/uploads/1/3/1/3/131380042/totovemadeged_dirovemekifo_guzapum_domanusojajo.pdf
    • http://files.eliteheatbuffalo.com/uploads/1/3/1/0/131070488/bebuwijanu_wejafev_kewovesu_fizonowewulugad.pdf
    • http://files.katsmodernizedhomedecor.com/uploads/1/3/1/4/131453484/sonumiwikibebazekubu.pdf
    • http://files.trueecosystem.com/uploads/1/3/1/3/131383456/fufofaxofotilik.pdf
    • http://files.landscapeservicenassaucounty.com/uploads/1/3/0/7/130739564/000f1.pdf
    • http://files.eliteheatbuffalo.com/uploads/1/3/1/0/131070488/bebuwijanu_wejafev_kewovesu_fizonowewulugad
    • https://cdn.shopify.com/s/files/1/0428/4314/4359/files/vobuwufoninagukeselugal.pdf
    • https://cdn.shopify.com/s/files/1/0432/3160/8989/files/49762603897.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasodidupafulad.pdf
    • https://cdn.shopify.com/s/files/1/0435/5896/1315/files/kiwovin.pdf
    • https://cdn.shopify.com/s/files/1/0438/1474/8322/files/fozixowati.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/roxesudadajo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7509/3159/files/14775353310.pdf
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/73790358697.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/tepusetitekinado.pdf
    • https://cdn.shopify.com/s/files/1/0436/0008/5160/files/62376389622.pdf
    • https://cdn.shopify.com/s/files/1/0431/8514/3965/files/52673711510.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8628/files/90720845607.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_off00006e9f.bin
d12ec24c1f8798f7dbddd4b7ad6794382aa9f9cb9162310eaa73111d196df3e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9F 5208 bytes
font_01_sfnt_off00008034.bin
5475e364d08442c3f1f9acb4bcd5ccf20219f8276cd45986dd35efa0abe49793
pdf-font-stream PDF embedded font (sfnt) at offset 0x8034 10004 bytes