Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb88e0c7eb970178…

MALICIOUS

PDF

42.1 KB Created: 2020-08-14 01:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 516b5af5e9d6c32052fe42e3f890969d SHA-1: 249e16dc4b98a00855e45039e7fd30fe24c07abb SHA-256: eb88e0c7eb970178f0bc798c5d217d3a011f5503d5ad04bff1009028815acbf3
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wb?keyword=download%20program%20pdf%20converter%20free'. This URL is embedded within the document body, suggesting a social engineering lure to trick users into downloading software. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external resources, many of which are hosted on Shopify. The primary redirector URL is the most critical IOC.

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.ru/wb?keyword=download%20program%20pdf%20converter%20free
    • http://files.pawtailssandiego.com/uploads/1/3/1/3/131380052/bb57e1c633c.pdf
    • http://momut.hawaiianislandjewelry.com/uploads/1/3/1/3/131381428/bipewu.pdf
    • http://kidafoje.dralexischesney.com/uploads/1/3/2/8/132814742/gikek.pdf
    • http://files.sweetstreet.info/uploads/1/3/1/4/131407469/7555571.pdf
    • http://gerem.speedraceing.com/uploads/1/3/1/3/131382382/9ff71fd4ca.pdf
    • https://cdn.shopify.com/s/files/1/0431/4975/4519/files/ancient_civilizations_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0989/1742/files/mapelazidinawubumepajivaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/avena_beneficios_para_la_salud.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4011/files/12471477899.pdf
    • https://cdn.shopify.com/s/files/1/0431/8114/6280/files/josetavajanenasu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1028/3931/files/riesgos_psicosociales_en_el_trabajo_peru.pdf
    • https://cdn.shopify.com/s/files/1/0428/3236/3676/files/68921958612.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/phonetics_meaning_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0430/5492/3925/files/sound_engineering_books_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/rafari.pdf
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/77152333955.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_off0000662e.bin
ec0007ce6a1515cafcd3011397cad8c57bdb611d56dbfe7489c2a842aef3b29e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x662E 5448 bytes
font_01_sfnt_off000078bf.bin
b67662cb0c645e92b2ce16ccfa2b924f5917983b76356979e3df30daa283a5e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78BF 10164 bytes

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