Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb8206111bb0f7d2…

MALICIOUS

PDF

45.4 KB Created: 2020-08-26 10:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 727897eab9f4b5e3d4f378833236f54b SHA-1: 7a92c72aad254d827cfd5e9a89f45bdac95c46f6 SHA-256: bb8206111bb0f7d2cb28619c89d5157480770a6744f8c89b4635abbb620aab3d
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is further supported by the document body containing the same URL and a 'waiting for download play store' lure. The PDF also contains a link farm heuristic, indicating a large number of external links, with the highest priority IOC being the malicious redirector URL. The document's structure and embedded links suggest a social engineering attempt to trick users into navigating to a potentially harmful site.

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.com/pify?keyword=waiting+for+download+play+store
    • http://duxat.classwithchris.com/uploads/1/3/0/7/130775518/tufekutoxev.pdf
    • http://rukol.salfordartclub.com/uploads/1/3/0/9/130969360/zomesumafadepus_fepiwufap_kokatosudumisop.pdf
    • http://vewazuf.coldwaterflowers.net/uploads/1/3/2/6/132682467/poluzijaf.pdf
    • http://files.tfitstudio.com/uploads/1/3/0/8/130814674/2055074.pdf
    • http://files.mealsonwheelssb.org/uploads/1/3/1/4/131437987/2e23cdde097c.pdf
    • https://cdn.shopify.com/s/files/1/0432/6912/8354/files/34152093018.pdf
    • https://cdn.shopify.com/s/files/1/0437/7722/8957/files/buzijosilajopevagovu.pdf
    • https://cdn.shopify.com/s/files/1/0439/7131/3822/files/renivorujogipijokareluvas.pdf
    • https://cdn.shopify.com/s/files/1/0428/0641/1431/files/94300672860.pdf
    • https://cdn.shopify.com/s/files/1/0432/7525/5961/files/wikeli.pdf
    • https://cdn.shopify.com/s/files/1/0434/2212/2151/files/xixokeditutav.pdf
    • https://cdn.shopify.com/s/files/1/0437/2060/5846/files/sorekutederaxokodewifuje.pdf
    • https://cdn.shopify.com/s/files/1/0433/3993/9994/files/reporter_salary_singapore.pdf
    • https://cdn.shopify.com/s/files/1/0465/1991/0558/files/nitto_atp_finals_draw.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_off0000738e.bin
9b9b0259645cf6b12525cb8f302453b39a4bafda10c657dc25dfe9078582e448		 pdf-font-stream PDF embedded font (sfnt) at offset 0x738E 5416 bytes
font_01_sfnt_off00008627.bin
c282761aa04c092764d544b232940e9ccc3845ef3f6c76f97f455a0d9630f96d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8627 10128 bytes

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