Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ef7428d55b5d84f…

MALICIOUS

PDF

43.1 KB Created: 2020-08-10 09:51:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 470652d1b6ec68e335c49fc54bb0324a SHA-1: ec9b6f72021c651090fc011aae508e1848c00a34 SHA-256: 8ef7428d55b5d84f07c57ec7936d65b2ce263ba25dc1509e470e7ddc9ca2f7f7
120 Risk Score

Malware Insights

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

The PDF file was flagged for containing a malicious redirector link and a large number of external PDF links, suggesting a link farm or redirection scheme. The primary malicious URL identified is https://ttraff.ru/pify?keyword=buying+behaviour+of+customers+pdf. The document body contains garbled text but also includes the same URLs, reinforcing the finding of a link farm. The presence of numerous links, including one pointing to a known malicious redirector, indicates an attempt to lure users to potentially harmful sites.

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/pify?keyword=buying+behaviour+of+customers+pdf
    • http://files.shopcompassrose.com/uploads/1/3/1/4/131438248/lizofaboxa.pdf
    • http://files.owyheeoffroadchallenge.com/uploads/1/3/2/7/132740659/8414697.pdf
    • http://files.thecheekyparlor.com/uploads/1/3/1/3/131383772/2705247.pdf
    • http://files.writinglifebarbaraoneil.com/uploads/1/3/1/1/131164488/nenefubiwurabuwawo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2303/1720/files/kilekitusumomidazi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0923/5353/files/abirami_anthathi.pdf
    • https://cdn.shopify.com/s/files/1/0435/1007/1460/files/zuloje.pdf
    • https://cdn.shopify.com/s/files/1/0431/6626/9600/files/6365595640.pdf
    • https://cdn.shopify.com/s/files/1/0430/9821/0461/files/miloganukixeroxataneg.pdf
    • https://cdn.shopify.com/s/files/1/0436/2862/6080/files/vedudesarizebure.pdf
    • https://cdn.shopify.com/s/files/1/0437/8873/0525/files/fisitubipabijuwewakiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dojedeteremedadedarovir.pdf
    • https://cdn.shopify.com/s/files/1/0448/0316/2269/files/cistoadenocarcinoma_seroso_papilar_de_ovario.pdf
    • https://cdn.shopify.com/s/files/1/0432/9055/8622/files/pofitiluwepifom.pdf
    • https://cdn.shopify.com/s/files/1/0433/7562/4350/files/73025437471.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_off0000686d.bin
70b99b2993304f75b5581a0e9c98bc152ef26f67233682f731eb1fcb1dbd765d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x686D 5888 bytes
font_01_sfnt_off00007c62.bin
180ed550bbd3cd7b4a2d539b2f775f2963ebd40a853fb5d4dee6592af163709b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C62 10260 bytes

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