Malicious PDF — malware analysis report

Static analysis result for SHA-256 51d974f88cffc23f…

MALICIOUS

PDF

45.7 KB Created: 2020-08-10 07:51:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad775ac51cb6d6964a8a2e3930bc9a37 SHA-1: 3a2f47a7a273cc183264f86d6cba14d8c44167fd SHA-256: 51d974f88cffc23f9d57fcf947998dea2ffbccfc6d4344acded45e3933b0a90b
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The document body contains embedded URLs, including a known malicious redirector, suggesting a phishing or malware distribution lure. No scripts were extracted, limiting further analysis of the execution chain.

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.ru/pify?keyword=organization+innovation+pdf
    • http://files.jbeamoncreative.com/uploads/1/3/0/9/130969190/dc64b22e67a.pdf
    • http://xexodopo.euccommunity.com/uploads/1/3/0/8/130814124/zixuruse_fizuketufa_sirixewasalubab_sivuwos.pdf
    • http://files.louiselightworker.com/uploads/1/3/2/7/132710491/fubipebif_lusagur_zozexelerufoto_sutikusogililu.pdf
    • http://files.hycracing.com/uploads/1/3/1/6/131606349/dudapexivuk_kudubodopedafiw_noxilidezejo_zojif.pdf
    • http://files.iaweworks.org/uploads/1/3/1/6/131608037/jixob.pdf
    • https://cdn.shopify.com/s/files/1/0441/1323/2024/files/judemelusunuxis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8833338052.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7349/files/rationalism_vs_empiricism_philosophy.pdf
    • https://cdn.shopify.com/s/files/1/0432/2207/3506/files/gmo_disadvantages.pdf
    • https://cdn.shopify.com/s/files/1/0430/7265/1413/files/51371199814.pdf
    • https://cdn.shopify.com/s/files/1/0434/4473/2065/files/nideverixusaburir.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jenodilibaxu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4921/2309/files/45793367916.pdf
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/wisolukij.pdf
    • https://cdn.shopify.com/s/files/1/0435/2727/4645/files/pepotinipokixorav.pdf
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/65251544999.pdf
    • https://cdn.shopify.com/s/files/1/0428/8295/7478/files/vamodilaju.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_off000066c9.bin
f99d723cbe9abc1409a0c8328938f47865a3e084d4323544445ee146c352d3cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x66C9 4804 bytes
font_01_sfnt_off00007736.bin
dac008049d5e327211f80af83a277b34c7fbf3c2e4bfd4021a1e1df575a0163a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7736 10644 bytes
font_02_sfnt_off00009b82.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B82 4324 bytes