Malicious PDF — malware analysis report

Static analysis result for SHA-256 7391fe7b99e81554…

MALICIOUS

PDF

42.8 KB Created: 2020-08-24 04:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 537793d415ca24a7fe52e91554bea94b SHA-1: 289644bf36ca107948bd080e8ab40254064eb0e0 SHA-256: 7391fe7b99e81554f262f5ae7760dd13f311297bb5b0e2c3f3b6030fb97e6d4e
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=bulma+login+form+example'. This URL is presented within the document body, disguised as a login form example, likely to trick users into clicking it. The file also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, many hosted on Shopify. The primary intent appears to be redirecting users to malicious infrastructure.

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=bulma+login+form+example
    • http://kufipiwen.rosewadenyabooks.com/uploads/1/3/1/0/131071157/f8f66.pdf
    • http://files.carlisleavenuediner.com/uploads/1/3/0/7/130776363/barevewoxogu_nusiwekimeken_rasitosenisa_kewofipise.pdf
    • http://files.ryanvasqueznyc.com/uploads/1/3/0/7/130775658/nibem-rijofuke-voruvolapilut.pdf
    • http://files.wendycharlton.net/uploads/1/3/0/8/130873783/xedenifogimuzefik.pdf
    • https://cdn.shopify.com/s/files/1/0436/4913/8846/files/50880727719.pdf
    • https://cdn.shopify.com/s/files/1/0430/5394/0887/files/rurin.pdf
    • https://cdn.shopify.com/s/files/1/0434/1488/0405/files/believe_in_yourself_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/xisedit.pdf
    • https://cdn.shopify.com/s/files/1/0433/6225/5006/files/14806053188.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5230/files/digimon_rearise_underworld_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/sony_4k_android_tv_55_inch.pdf
    • https://cdn.shopify.com/s/files/1/0432/2289/2711/files/xopewonugiga.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/kingdom_tv_show_episode_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9812/9062/files/52919208199.pdf
    • https://cdn.shopify.com/s/files/1/0433/4452/7511/files/27617327896.pdf
    • https://cdn.shopify.com/s/files/1/0435/9100/8418/files/algorithm_design_manual_by_steven_skiena.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_off00005b69.bin
057537e4180754db66db4f27d72d7aff948a4fe439304a17a3a665ad98602f75
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B69 5160 bytes
font_01_sfnt_off00006ceb.bin
9e6291dcbb0a555366024432331ae919c41dfee11f058561f644f0455fb4677d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CEB 15376 bytes