Malicious PDF — malware analysis report

Static analysis result for SHA-256 9223b42426fc0615…

MALICIOUS

PDF

73.8 KB Created: 2020-08-25 04:10:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab1cff0a34e1884a4c3eb2f063eb525c SHA-1: c7b2b14504b3543dca4dba5956c2fea825450044 SHA-256: 9223b42426fc0615945a461ec8c3d383fa8d3b34c2b27feb5f2e43d781ae2f5b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=electric+zoo+spongebob+sheet+music'. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of numerous links and the redirector indicate a likely phishing or malware delivery attempt.

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=electric+zoo+spongebob+sheet+music
    • http://files.adamolsenphoto.com/uploads/1/3/0/7/130775506/mofomatuto_joxuzesiran_vumevomelura.pdf
    • http://pexep.juliaburnettpaintings.com/uploads/1/3/1/0/131071157/savuv_pekiled.pdf
    • http://files.belmulletheritageday.com/uploads/1/3/0/7/130740262/3188a96a21e7ab.pdf
    • http://tafivibo.talkingaboutscience.com/uploads/1/3/1/4/131438474/gavuvaxuxom.pdf
    • http://tibod.mosaicdownsyndrome.com/uploads/1/3/2/7/132712324/domamavur.pdf
    • https://cdn.shopify.com/s/files/1/0435/4008/6935/files/rewuluzidam.pdf
    • https://cdn.shopify.com/s/files/1/0434/2926/5564/files/jirixokig.pdf
    • https://cdn.shopify.com/s/files/1/0450/8745/7432/files/vavexujuwor.pdf
    • https://cdn.shopify.com/s/files/1/0461/3911/3625/files/voladumezojib.pdf
    • https://cdn.shopify.com/s/files/1/0427/6027/4087/files/jegagepubipurunisal.pdf
    • https://cdn.shopify.com/s/files/1/0430/3929/3593/files/profenid_bula_profissional.pdf
    • https://cdn.shopify.com/s/files/1/0449/7843/8302/files/vf_corporation_sustainability_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/3872/7589/files/ethiopian_astrology_books.pdf
    • https://cdn.shopify.com/s/files/1/0439/6577/6030/files/ken_mcclay_the_mapping_of_geological_structures.pdf
    • https://cdn.shopify.com/s/files/1/0435/4431/4011/files/laboratory_report_format.pdf
    • https://cdn.shopify.com/s/files/1/0431/7357/6865/files/xaraxokilotibadex.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_off0000d334.bin
70a20f41f67b1ce9ea68a3e790649558b22c2457e88e5f8b0cad9c9ab75189df
pdf-font-stream PDF embedded font (sfnt) at offset 0xD334 5284 bytes
font_01_sfnt_off0000e507.bin
a961c1363087f591efdaad10a0d1f5a08bcc5f8bbb66ed3d44d72886ac995170
pdf-font-stream PDF embedded font (sfnt) at offset 0xE507 16320 bytes