Malicious PDF — malware analysis report

Static analysis result for SHA-256 5285930560b41abc…

MALICIOUS

PDF

42.0 KB Created: 2020-08-05 07:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bece5e06c912c0ccd2ac58c1fa10ee39 SHA-1: 3fb320318a7219cf4f2ef18ba01dc5615d6695a8 SHA-256: 5285930560b41abcc459aae40f112cfc97eaa76e22c845f173adc264cd376ffb
150 Risk Score

Malware Insights

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

The PDF document contains a mass of external links, masquerading as a "Bihar physical map pdf" to lure users. One of the embedded links, https://ttraff.cc/pify?keyword=bihar+physical+map+pdf, points to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness.

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=bihar+physical+map+pdf
    • http://files.samchaseyoga.com/uploads/1/3/1/1/131164076/6876523.pdf
    • http://files.karamagreenhouses.org/uploads/1/3/0/7/130739015/vevan.pdf
    • http://files.kashmirweavers.org/uploads/1/3/1/8/131871390/7e47569.pdf
    • https://cdn.shopify.com/s/files/1/0430/6845/7122/files/vawag.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6004/files/2031670553.pdf
    • https://cdn.shopify.com/s/files/1/0432/7404/3556/files/minecraft_wrath_enchantment.pdf
    • https://cdn.shopify.com/s/files/1/0429/7195/5351/files/tafupula.pdf
    • https://cdn.shopify.com/s/files/1/0428/0628/0355/files/crculos_armnicos_guitarra.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mapiguwidekedod.pdf
    • https://cdn.shopify.com/s/files/1/0434/2022/1607/files/98283656969.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7728/files/5730832004.pdf
    • https://cdn.shopify.com/s/files/1/0435/3861/2378/files/98258146600.pdf
    • https://cdn.shopify.com/s/files/1/0437/4921/2309/files/resmed_s9_clinician_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/2086/0064/files/21072595917.pdf
    • https://cdn.shopify.com/s/files/1/0435/4949/1359/files/da_form_2166-_9_fillable.pdf
    • https://cdn.shopify.com/s/files/1/0437/5409/4753/files/81148393927.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_off0000639d.bin
b5031be942c8ddfc99356f54acccb8cbcd3580aada16c73ec5e2183c88801727		 pdf-font-stream PDF embedded font (sfnt) at offset 0x639D 5544 bytes
font_01_sfnt_off00007657.bin
afd093cbe7a6c1ee40bcb1814e62588edce7f6996869d6024ff2f27e4937bce9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7657 10576 bytes

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