Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7e31933a6492093…

MALICIOUS

PDF

40.4 KB Created: 2020-08-11 13:40:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5101909375442f5c8b6569fecd1db4ae SHA-1: 8796ae344f526ea686c4d20d20d9217e24fec7dd SHA-256: a7e31933a649209352826304904abd9364d3860cff6a3e0aac0a94b1037b682d
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources, including a known malicious redirector. The document body and embedded links suggest a lure related to academic materials, likely intended to trick users into visiting malicious sites for phishing or malware downloads. The primary malicious URL identified is https://ttraff.ru/pify?keyword=cengage+chemistry+class+11+pdf.

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=cengage+chemistry+class+11+pdf
    • http://jinemek.drdorsbbq.com/uploads/1/3/0/8/130874218/2916d5.pdf
    • http://files.jessiefield.com/uploads/1/3/1/4/131453724/30965.pdf
    • http://files.drywallsaltlakecity.com/uploads/1/3/2/7/132741385/fitesisufibuxot-sugelikafusumul-zavokorotujapij.pdf
    • http://febexu.alwaysmoreleadsaruba.com/uploads/1/3/1/4/131406749/9046600.pdf
    • https://cdn.shopify.com/s/files/1/0431/0306/0128/files/academic_journal_guide_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/can_t_help_falling_in_love_piano_guys.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/79791973968.pdf
    • https://cdn.shopify.com/s/files/1/0432/1991/0820/files/85661731902.pdf
    • https://cdn.shopify.com/s/files/1/0432/6889/8966/files/academic_writing_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/375698358.pdf
    • https://cdn.shopify.com/s/files/1/0437/4868/8033/files/lalozuti.pdf
    • https://cdn.shopify.com/s/files/1/0435/4061/1226/files/44201137891.pdf
    • https://cdn.shopify.com/s/files/1/0437/0939/9192/files/regedosud.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rumifagekesodurelakalon.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2337/files/zodota.pdf
    • https://cdn.shopify.com/s/files/1/0432/8846/1478/files/cycle_evolutif_de_schistosoma_haematobium.pdf
    • https://cdn.shopify.com/s/files/1/0428/9485/2252/files/sujiparawapajeziralebibo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/64989875230.pdf
    • https://cdn.shopify.com/s/files/1/0437/3633/4501/files/61494910045.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_off00005df3.bin
a6f4f0cc1c3af858b4cf1fdb8dcf739743b08d452ac75a3ec4a539ea74b4f05b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF3 5628 bytes
font_01_sfnt_off000070f2.bin
21be03f46071c39384631d2cb6cba58755704b56121b8de699d20fe7e6414364
pdf-font-stream PDF embedded font (sfnt) at offset 0x70F2 10516 bytes