Malicious PDF — malware analysis report

Static analysis result for SHA-256 53b85e7fabf7051e…

MALICIOUS

PDF

43.6 KB Created: 2020-08-27 14:05:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a77fd1ecd1534a2feaff1bef3fbfd1bd SHA-1: 3956ab5f638be71cb4d6ec78f9c0dfe712cc5c0f SHA-256: 53b85e7fabf7051e4c7e63e13a54d49e5d90ab14228b6b61c3e6ba364c1ff765
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify, which is indicative of a link farm used for SEO manipulation. One of the embedded links redirects to a known malicious URL, ttraff.cc, suggesting a malicious intent to lure users to harmful content. The ML classifier also strongly flagged this PDF as malicious.

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=brownie+badge+requirements+making+games
    • http://files.thewhiptones.com/uploads/1/3/1/0/131069890/tizur_vekofajafaj_jujuv.pdf
    • http://files.rosefellowship-punchlist.com/uploads/1/3/1/1/131164431/c6c91671e8.pdf
    • http://mepaxuru.thecrossingwv.com/uploads/1/3/2/6/132680866/5292862.pdf
    • http://files.azprint115.com/uploads/1/3/1/0/131070165/vuvebu_kepufuduwaborug.pdf
    • http://files.warwickchinese.com/uploads/1/3/1/0/131071067/piwifevo_jinuke_busilapubamuma.pdf
    • https://cdn.shopify.com/s/files/1/0437/1385/5643/files/the_brightest_stars_anna_todd_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/70834703651.pdf
    • https://cdn.shopify.com/s/files/1/0429/3787/6639/files/certificate_borders_vector_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/3987/3429/files/chisel_and_plane_blade_honing_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/59312880025.pdf
    • https://cdn.shopify.com/s/files/1/0438/8261/0843/files/defakerura.pdf
    • https://cdn.shopify.com/s/files/1/0435/7462/4419/files/2620_9b_1900_1.pdf
    • https://cdn.shopify.com/s/files/1/0433/5871/6055/files/seat_ateca_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/2860/3295/files/pugiru.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5708/files/nuzise.pdf
    • https://cdn.shopify.com/s/files/1/0431/8350/5570/files/maripokel.pdf
    • https://cdn.shopify.com/s/files/1/0440/0657/2197/files/beirut_city_map.pdf
    • https://cdn.shopify.com/s/files/1/0432/2734/9159/files/xitotituzilu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5721/7693/files/30604380978.pdf
    • https://cdn.shopify.com/s/files/1/0432/1935/3767/files/xulabipezutegilekej.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_off00006aa0.bin
9c3eb251a1a9c0e9490218071fd9f757994059bfad9fdf366d701fbc972e3969
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA0 5584 bytes
font_01_sfnt_off00007d95.bin
e0d1cfc1e2957660446b74dc1174eb788b5f8000117b4e791c237c486541e81a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D95 10300 bytes