Malicious PDF — malware analysis report

Static analysis result for SHA-256 48f366ad783b9004…

MALICIOUS

PDF

45.8 KB Created: 2020-08-21 20:39:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5c2d66cd3b30e72a33a2743811b6634 SHA-1: 4649dfbc02b091dae9f87654256cdf20abc7d33a SHA-256: 48f366ad783b900466d623a92aaa1432bd203b0bd738dff9b2da2579970ec12c
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. This indicates a likely phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=clemson+football+sports+information+director
    • http://files.reformationfarms.com/uploads/1/3/1/8/131857562/zasinavepo_sesosuk_fowoboma.pdf
    • http://files.cwnativeplantfarm.com/uploads/1/3/2/6/132681536/waverelobu_dosagisudoti_zidob.pdf
    • http://files.tallulahsjewelry.com/uploads/1/3/0/7/130740012/1431625.pdf
    • http://poreka.acbla.org/uploads/1/3/0/7/130775643/jiwaremilovika_podabulam_fefariz.pdf
    • http://files.rchatierrasanta.com/uploads/1/3/1/3/131383892/vuzasolosuj.pdf
    • https://cdn.shopify.com/s/files/1/0445/4960/3487/files/ragubonumizevaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/3551/7337/files/bobepuga.pdf
    • https://cdn.shopify.com/s/files/1/0437/1221/7241/files/tyrants_of_the_nine_hells.pdf
    • https://cdn.shopify.com/s/files/1/0452/4769/2957/files/android_phone_keeps_booting_into_safe_mode.pdf
    • https://cdn.shopify.com/s/files/1/0454/2945/7064/files/mtodo_de_la_ovulacin_billings.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4414/files/zalodom.pdf
    • https://cdn.shopify.com/s/files/1/0428/3524/7271/files/wopasavepugekediwozu.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_off000075f1.bin
db58c66cf9045e143ac302ac96c58cfb04725022881544830aff458cd1f6f6fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75F1 5344 bytes
font_01_sfnt_off00008801.bin
c144a031031eedb6424ccebdfffd1dfa434e618c42800a0971434437caaa3f51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8801 10284 bytes

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