Malicious PDF — malware analysis report

Static analysis result for SHA-256 a79d7a22ad9c88af…

MALICIOUS

PDF

52.6 KB Created: 2020-08-27 12:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b38a09f847a5758c33f88144aab4d03c SHA-1: 0d5d8a1515d4d7a1954851bd97341e039d631516 SHA-256: a79d7a22ad9c88af8724a3ff8ae42e7f535565fe3c8189e07982ea4b6c6660df
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.cc/pify?keyword=basic+mathematics+formula+for+compet, which is likely used to redirect users to further malicious content. The document body, though heavily obfuscated, contains this URL and other links, suggesting a lure to a malicious site disguised as a formula sheet.

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=basic+mathematics+formula+for+compet
    • http://kobewot.herricksupportstaff.com/uploads/1/3/0/7/130776783/givenosiledore.pdf
    • http://files.franticband.com/uploads/1/3/1/4/131437977/jetiresunef.pdf
    • http://files.mssimonsays.org/uploads/1/3/1/3/131383380/neguxizufetek-xazaxakurogiri-nikotesari.pdf
    • http://files.artisticcounterculture.com/uploads/1/3/0/7/130740316/00a893798942c26.pdf
    • http://files.callingallcreative.com/uploads/1/3/1/8/131857565/14fefb07f9.pdf
    • https://cdn.shopify.com/s/files/1/0462/1588/9050/files/73450178768.pdf
    • https://cdn.shopify.com/s/files/1/0434/8300/5078/files/78596677842.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5211/files/whatsapp_status_video_hd_mp4_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/3635/9326/files/anesthesia_drug_doses.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67572949107.pdf
    • https://cdn.shopify.com/s/files/1/0427/9674/4871/files/47322968150.pdf
    • https://cdn.shopify.com/s/files/1/0436/6349/1222/files/visew.pdf
    • https://cdn.shopify.com/s/files/1/0437/3502/3765/files/ashwamedha_kannada_movie_songs.pdf
    • https://cdn.shopify.com/s/files/1/0432/8987/0491/files/92953322474.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_off00006f22.bin
b981e6a66ec5c2a5232574dcec324441520e6f2d45a1381f3dfc7c7fdfb6bab2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F22 5304 bytes
font_01_sfnt_off00008108.bin
bdde46c0dae6392f42c7e4d1c71781308ff9c898063d4a63b8cc99c06be4ce10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8108 14760 bytes
font_02_sfnt_off0000af24.bin
0da5b551d84a453f500a6ba8ca1adfd4400b36dae0f103b74fb712e1a4f46a36		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF24 16064 bytes

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