Malicious PDF — malware analysis report

Static analysis result for SHA-256 2276a56775bc2bc9…

MALICIOUS

PDF

47.4 KB Created: 2020-07-31 08:17:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72ed331448f035d5f88b8054a3aba262 SHA-1: 7d244e65e9766eda14a90d3aea19fcdfb74b87e7 SHA-256: 2276a56775bc2bc911fb4fb28c2c5c7175e01bbe3ce5d065bc52160b0169f276
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=victoria+australia+road+map+pdf'. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of a link farm heuristic further supports the malicious intent of redirecting users to external 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=victoria+australia+road+map+pdf
    • http://files.christophmaximus.com/uploads/1/3/1/4/131407952/vumerojaliwigedibuji.pdf
    • http://files.jakeshortakes.com/uploads/1/3/1/6/131606092/6d28ef5fac.pdf
    • http://files.mindfulmamayoga.com/uploads/1/3/1/3/131383456/9475299.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/27657196734.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/deluzopokipejapuko.pdf
    • https://cdn.shopify.com/s/files/1/0429/7005/4805/files/76131982362.pdf
    • https://cdn.shopify.com/s/files/1/0428/2518/7491/files/nixunerobijenefaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98774508290.pdf
    • https://cdn.shopify.com/s/files/1/0433/2742/2632/files/zopudojexiwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/tubaserojizox.pdf
    • https://cdn.shopify.com/s/files/1/0427/9376/2975/files/wubemavakusi.pdf
    • https://cdn.shopify.com/s/files/1/0436/6427/7657/files/maforafewupobijara.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/xururawuwemololo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zupapinited.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57515970725.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/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98774508290.p

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d26.bin
3d9c9860cd0006dda96dc52f0f4fa013c4cc1bb6f0fa3fa7cfe5c9aeb0b7681d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D26 4924 bytes
font_01_sfnt_off00008de1.bin
2b4b28252eda96d24702e573e98a9d7ceabbbe70c5a4ed1742de0b6e9fd28260		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE1 10172 bytes

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