Malicious PDF — malware analysis report

Static analysis result for SHA-256 a79f5d88bf5f5e75…

MALICIOUS

PDF

52.6 KB Created: 2020-08-04 21:27:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61149cf1fb83720c06b46efc49f28c98 SHA-1: 6c41788dd5e6859f8ec5db5deb2332045c5320a8 SHA-256: a79f5d88bf5f5e75e52ef285734def631b9067cfa191e953e723cf33c7876bfa
120 Risk Score

Malware Insights

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

The PDF contains a link to a redirector, which is a common tactic for phishing and malware delivery. The document body, though heavily obfuscated, contains text related to sending PDF attachments via email, suggesting a social engineering lure. The presence of numerous external links, including one to a redirector, indicates a link farm or phishing attempt. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=how+to+send+pdf+attachment+through+email+in+php
    • http://files.elginyouthchoir.org/uploads/1/3/1/6/131608037/nefik-torot.pdf
    • http://files.futurefoundationsct.com/uploads/1/3/1/4/131406535/pupuxiko-xakaladila-sisamuderu-towurix.pdf
    • http://files.reveil-corporel.com/uploads/1/3/2/6/132695321/dowezoxosak.pdf
    • http://files.cchspostgrad.com/uploads/1/3/0/7/130776291/foxaxokijufalamu.pdf
    • http://files.tynksgemstonedesigns.com/uploads/1/3/2/7/132740415/7381d2f1749d4.pdf
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/star_fox_adventures_iso.pdf
    • https://cdn.shopify.com/s/files/1/0434/4519/0821/files/banurefenamomosawevoxaxes.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/introductory_chemistry_7th_edition_corwin.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9295/files/kikixusamimigu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/red_chins_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/free_pokecoins_no_survey.pdf
    • https://cdn.shopify.com/s/files/1/0428/2440/1063/files/ruvovufemusuxuxipa.pdf
    • https://cdn.shopify.com/s/files/1/0434/9670/2104/files/xuwivibetum.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/vusaxebivutalenedomazule.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/xavekirigaluxadipuvoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/4742/0066/files/fokodanafodolemavikekira.pdf
    • https://cdn.shopify.com/s/files/1/0434/8752/7078/files/matajavi.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_off00006f1c.bin
50cd4d927a39e270420e042ba3f7e986adc02beee2adbb17bb08f9125a5c9d09
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1C 5504 bytes
font_01_sfnt_off000081b0.bin
dc3f801271d45db3a7eec8c0e68e743df43fa5d83625e970235f4e3c8511bc64
pdf-font-stream PDF embedded font (sfnt) at offset 0x81B0 17104 bytes
font_02_sfnt_off0000b6ff.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xB6FF 4324 bytes