Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3414e784302a9a1…

MALICIOUS

PDF

102.6 KB Created: 2020-08-10 14:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b761e06c3b7956f44c7da58c33936d7 SHA-1: 64003e3bde143d6f49d615c1d2ab0ea8791c8138 SHA-256: b3414e784302a9a1a6c78e9949c882fb65f23432b3b3d893a72f619e409245da
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are SEO-optimized to appear as legitimate downloads. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the URL that triggered the redirector heuristic, suggesting a lure for free content to facilitate malicious redirection.

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=pl+sql+tutorial+pdf+free+download
    • http://files.clearfieldcreekwatershed.org/uploads/1/3/1/3/131380627/c639c4ff8cacf7f.pdf
    • http://files.mitalentzcompany.com/uploads/1/3/2/6/132695698/sidekipuvanetuwazora.pdf
    • http://files.deannalorenphotography.com/uploads/1/3/0/8/130814298/vijesomep.pdf
    • http://files.professionalbusinessplans.com.au/uploads/1/3/0/9/130969306/vomudow-kaduj.pdf
    • https://cdn.shopify.com/s/files/1/0427/9028/9574/files/globalizacion_neoliberalismo_y_educacion.pdf
    • https://cdn.shopify.com/s/files/1/0438/1966/3522/files/bifineneruzomu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2647/2347/files/tisubipebam.pdf
    • https://cdn.shopify.com/s/files/1/0430/0252/7897/files/83910710654.pdf
    • https://cdn.shopify.com/s/files/1/0432/2200/7965/files/chemistry_notes_for_class_12_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/69850503956.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/newusugugenaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/1547/8176/files/4924863896.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/lexatamefiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/fevigodenifotivipuvere.pdf
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/usb2._0_crw_driver.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1438/files/90387417216.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000141c1.bin
5f42d4fc1d7eff738e211d70ff70356ee1a85a659df745b9374cbdb05863133a
pdf-font-stream PDF embedded font (sfnt) at offset 0x141C1 1764 bytes
font_01_sfnt_off00014a5e.bin
815b2a4ab8487a0c2bc3e8a1abe0345a43a8313a61e70a0701588429f8d78357
pdf-font-stream PDF embedded font (sfnt) at offset 0x14A5E 5252 bytes
font_02_sfnt_off00015c5d.bin
45eca96f668324cf348afbad3937cccff80318d1b8f3c9de17e1826022c1a793
pdf-font-stream PDF embedded font (sfnt) at offset 0x15C5D 15808 bytes