Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed5e25f919d8318…

MALICIOUS

PDF

43.9 KB Created: 2020-08-18 17:40:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 223450bbadc8d1b6824302e70a01f661 SHA-1: ed092493a9cfdb662ae751a158cb5a42f3329478 SHA-256: 9ed5e25f919d8318a4d24dba6c8ca2957028773d411b64e647a28668d06a0d02
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector at `ttraff.ru`. The document body, though heavily obfuscated, contains text related to a "certificate of conformity" and the malicious URL, suggesting a social engineering lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy to distribute the malicious payload. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=certificate+of+conformity+coc+sri+lanka
    • http://files.the-5fs.com/uploads/1/3/0/7/130775506/firivusotoloded.pdf
    • http://tufex.franbarsbyharpist.co.uk/uploads/1/3/1/3/131379730/7109563.pdf
    • http://files.cuatropuntos.org/uploads/1/3/0/7/130739175/waridojijuneg.pdf
    • http://files.scullycustomcarpentry.com/uploads/1/3/0/7/130739919/suris.pdf
    • https://cdn.shopify.com/s/files/1/0434/1871/4264/files/21515314167.pdf
    • https://cdn.shopify.com/s/files/1/0434/2893/7880/files/schlage_be365_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/4763/3575/files/miguweviguton.pdf
    • https://cdn.shopify.com/s/files/1/0431/6794/0765/files/michelin_guide_restaurants_nyc.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/49805021787.pdf
    • https://cdn.shopify.com/s/files/1/0432/6745/7188/files/zenudimuziwoketokukamel.pdf
    • https://cdn.shopify.com/s/files/1/0430/0531/3177/files/sebimokakuvisitifular.pdf
    • https://cdn.shopify.com/s/files/1/0437/6517/0334/files/23152613594.pdf
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/pupesugopiwolasotumagubim.pdf
    • https://cdn.shopify.com/s/files/1/0428/2590/8383/files/bobaxudasekem.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_off00006e6f.bin
0ed0e57919af78abefcb4c67f9f5abd6e9e5b9e2bcc35884cd1ff38e7b13bf92
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6F 5100 bytes
font_01_sfnt_off00007fb6.bin
5c94968e337712e6a09e165c510078f67ba8d912aa1b5ddf40c2d2d45f6d827b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB6 10344 bytes