Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9a2de3a94c240d7…

MALICIOUS

PDF

38.8 KB Created: 2020-08-09 23:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3f7fcbc55c039a250e3112af20a6bf0 SHA-1: d642149a13539acdc1ddcf6d3168c2c501a8837a SHA-256: c9a2de3a94c240d79865191f93514f6ad12911d48ebd0d77485bfaeb4467f487
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a 'bses yamuna duplicate bill pdf', which is a common lure for phishing or malware delivery. The presence of many external PDF links, including one to a redirector, indicates a likely attempt to direct the user to a malicious site.

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=bses+yamuna+duplicate+bill+pdf
    • http://files.turningpointbc.org/uploads/1/3/0/7/130738803/derobazizik.pdf
    • http://files.catherine-banner.com/uploads/1/3/1/4/131453267/f6c2aa21.pdf
    • http://jelalasar.fieldofviewwg.org/uploads/1/3/1/8/131871721/cb140e.pdf
    • http://files.nuclearwarfare.de/uploads/1/3/1/4/131406518/3102035.pdf
    • http://files.carolinerosenblum.net/uploads/1/3/1/3/131379919/39c0a0639.pdf
    • https://cdn.shopify.com/s/files/1/0428/5959/3894/files/dexuxiw.pdf
    • https://cdn.shopify.com/s/files/1/0430/9765/3397/files/korinupikikafarusi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2289/2711/files/tofeta.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/taridulozomoxekolakinuku.pdf
    • https://cdn.shopify.com/s/files/1/0430/8982/1845/files/jujezotiluxagewadeliri.pdf
    • https://cdn.shopify.com/s/files/1/0431/1918/1978/files/kotor_flawless_widescreen.pdf
    • https://cdn.shopify.com/s/files/1/0430/2356/4957/files/animal_crossing_new_leaf_hair_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/0818/0895/files/supply_chain_analytics.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/76983651155.pdf
    • https://cdn.shopify.com/s/files/1/0432/1673/2315/files/tanerevunidogagon.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nenixuraxolitater.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_off000058f0.bin
1d47c03b0e0b11c4228a342c64de34ee976ef0b5fd3718146c91fb7ea872fefb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58F0 5496 bytes
font_01_sfnt_off00006b9c.bin
689a2cf3744b1bbdc04c801df09dddbe07546729953d619ae1841d0fe75c57bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B9C 10240 bytes

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