Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7806c36170551e1…

MALICIOUS

PDF

49.0 KB Created: 2020-08-12 08:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa6dc7f1b734dac554d8382bbaf98f78 SHA-1: 2906ec9e2ec0a6db1ff95e6ca562a846bfcdc077 SHA-256: c7806c36170551e1ca0cb43747f5e1f89d744465f574398a87c169301dc23905
180 Risk Score

Malware Insights

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

The PDF document contains a link farm and a malicious redirector pointing to a lure for 'Cambridge English Advanced 2 PDF'. It explicitly requests recovery secrets or private keys, indicating a phishing attempt. The embedded URL https://ttraff.ru/pify?keyword=cambridge+english+advanced+2+pdf is a critical indicator of malicious redirection. The document body, though heavily obfuscated, contains the same lure URL.

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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=cambridge+english+advanced+2+pdf
    • http://files.aerialsouthampton.com/uploads/1/3/1/4/131483201/bejokowufe-sujovexafag-roxam-matuxemuj.pdf
    • http://files.opuspoodles.com/uploads/1/3/0/7/130739158/2349164.pdf
    • http://files.orchardhillsbangor.com/uploads/1/3/1/4/131437385/zaxavimidesipigez.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/borelixakezolironuterige.pdf
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/viguvupenokusakikumewi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3598/1974/files/army_acft_standards.pdf
    • https://cdn.shopify.com/s/files/1/0437/6612/0609/files/dopeg.pdf
    • https://cdn.shopify.com/s/files/1/0428/3305/1814/files/letibexeronun.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/gonirexoje.pdf
    • https://cdn.shopify.com/s/files/1/0430/9558/9013/files/80677003973.pdf
    • https://cdn.shopify.com/s/files/1/0447/8690/9341/files/medicinal_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/adjectives_and_prepositions.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/97430432560.pdf
    • https://cdn.shopify.com/s/files/1/0432/7407/6315/files/aisc_seismic_design_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/8817/5513/files/35873138019.pdf
    • https://cdn.shopify.com/s/files/1/0433/7867/1783/files/presentation_skills_body_language.pdf
    • https://cdn.shopify.com/s/files/1/0437/0402/5242/files/allweiler_centrifugal_pump_catalogue.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_off00007e6e.bin
edb871f06a547f70c9d70d3a584656611ef2984e41bdf6f51fd9fc2c8eb95aa0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E6E 5804 bytes
font_01_sfnt_off0000920d.bin
3d29ca39be962d437482cfc8fb7a17a1f7c6e3bd1da8633127f3ff06f55e9df0
pdf-font-stream PDF embedded font (sfnt) at offset 0x920D 10760 bytes