Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd5a3ef060a6e73…

MALICIOUS

PDF

42.5 KB Created: 2020-07-29 15:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95acf94861d13d42fedf855d03638816 SHA-1: 0004fae3c459cafba7f7beb4a50133f81a12ad13 SHA-256: 3fd5a3ef060a6e73948024c2574262d7834d3be153711a3c9d7c56bd15ed0c5b
120 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.ru', which is associated with distributing malware. Additionally, it features a large number of external PDF links, many hosted on Shopify, suggesting a link farm for SEO poisoning or malware distribution. The document body, though heavily obfuscated, contains text related to 'Railway ticket reservation form pdf download', reinforcing the lure.

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=railway+ticket+reservation+form+pdf+download
    • http://files.tallywood.com/uploads/1/3/1/4/131437172/jekerexuwasagowizusa.pdf
    • http://files.brightenthebrain.com/uploads/1/3/0/8/130874046/jogunodemuf.pdf
    • http://files.believewithin.com/uploads/1/3/0/7/130775982/f54d354b2.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6517/files/30510763268.pdf
    • https://cdn.shopify.com/s/files/1/0435/1413/4692/files/3663405611.pdf
    • https://cdn.shopify.com/s/files/1/0433/6081/3208/files/beposozirosutajif.pdf
    • https://cdn.shopify.com/s/files/1/0435/8055/5419/files/simubexijojavipaxuvab.pdf
    • https://cdn.shopify.com/s/files/1/0428/0428/1511/files/libivose.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/jezupadajexelomumeb.pdf
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/bazajumobunidival.pdf
    • https://cdn.shopify.com/s/files/1/0438/1153/7053/files/lokixo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7190/4673/files/gujekazirisedus.pdf
    • https://cdn.shopify.com/s/files/1/0430/9896/4117/files/1560001858.pdf
    • https://cdn.shopify.com/s/files/1/0434/3804/7384/files/wopotanisiloverejigox.pdf
    • https://cdn.shopify.com/s/files/1/0437/2329/2822/files/zewipinaw.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/
    • https://cdn.shopify.com/s/files/1/0428/0428

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000682b.bin
6c19107b66268b1f2960b47b4375207c37a3108d36d417578aa5f994e736f49e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x682B 5412 bytes
font_01_sfnt_off00007a94.bin
929d4ebb65b6a86318bbbe884c1600166a5f6d0ad7afa7811659baa20155f1a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A94 10004 bytes

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