Malicious PDF — malware analysis report

Static analysis result for SHA-256 81d9f4f4c3014547…

MALICIOUS

PDF

41.7 KB Created: 2020-08-17 02:41:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0f9a8fdb2c586e1ace6c7e0b78bf7ce SHA-1: a4f4ae99d705d92acf11f0e179f029a31108a71f SHA-256: 81d9f4f4c3014547cec81825a30812c5f881bc28662e39a6e791103aae905463
142 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure for a movie download, which aligns with the malicious redirector link. The presence of numerous external PDF links further supports a link farm or redirection tactic. The primary malicious IOC is the redirector 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=anaconda+3+movie+telugu
    • http://files.empressreadings.com/uploads/1/3/1/6/131636872/64377.pdf
    • https://cdn.shopify.com/s/files/1/0433/6225/5013/files/40575702176.pdf
    • https://cdn.shopify.com/s/files/1/0449/2935/1835/files/acute_coronary_syndrome_management.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/workday_hcm_training.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/6293616943.pdf
    • https://cdn.shopify.com/s/files/1/0430/3775/3501/files/8255964920.pdf
    • https://cdn.shopify.com/s/files/1/0431/4054/6714/files/xifukunid.pdf
    • https://cdn.shopify.com/s/files/1/0431/1007/2481/files/utah_county_jail_inmate_search.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3553/files/37517179609.pdf
    • https://cdn.shopify.com/s/files/1/0431/3835/1255/files/basic_computer_skills_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/5235/2156/files/descargar_certificado_de_secundaria.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_off00005f2f.bin
617c97f5dbdb9d825be1f983bddb2ae2786fa2c2610b5f8e31a17c075eaee518		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2F 5200 bytes
font_01_sfnt_off000070ca.bin
acaaaf4008e95135374bef794f751e568ac2a2f44b39df60c84bbd4f840b6044		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70CA 13272 bytes

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