Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3b559efd7c9884c…

MALICIOUS

PDF

57.8 KB Created: 2020-08-07 06:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7de7c3024e49ed05f1e77fda33cb0325 SHA-1: 20b20865dd416aa82e30b2c022e8a41a9b33dbd5 SHA-256: e3b559efd7c9884c6f931ec5275ad497c08173833afc9f51d14de874a4e9cead
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link pointing to 'ttraff.ru', disguised with a seemingly legitimate academic keyword. The document body, though heavily obfuscated, contains the same academic keyword and the malicious URL. The PDF also hosts a large number of external links, many pointing to Shopify, suggesting a link farm or redirection strategy. The primary attack vector appears to be tricking the user into clicking the malicious link within the PDF.

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=adipocyte+differentiation+and+gene+expression+pdf
    • http://files.flights-of-fantasy.com/uploads/1/3/1/4/131409761/1233061.pdf
    • http://zibori.jhmartist.com/uploads/1/3/1/3/131381204/f6d337.pdf
    • http://files.naturalmusicmarketing.net/uploads/1/3/0/8/130874050/refeg-mikugeji-rovowisosib-sogiweze.pdf
    • http://files.27westmovie.com/uploads/1/3/1/4/131437229/niviv-dukanakof-fugolose.pdf
    • http://files.dayofreligiouspluralism.org/uploads/1/3/2/3/132303138/4a55fb016bcece.pdf
    • https://cdn.shopify.com/s/files/1/0431/6794/0765/files/86019991169.pdf
    • https://cdn.shopify.com/s/files/1/0440/1076/6486/files/minimization_of_boolean_functions.pdf
    • https://cdn.shopify.com/s/files/1/0437/8555/2030/files/gaxuganofuripedoje.pdf
    • https://cdn.shopify.com/s/files/1/0434/3840/7845/files/kozepotebamitubejotored.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43692268827.pdf
    • https://cdn.shopify.com/s/files/1/0434/0324/7781/files/vejijipapolemeb.pdf
    • https://cdn.shopify.com/s/files/1/0447/1826/0377/files/harbor_breeze_remote_control.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/fizukasudomufadiwukodumuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/9889/8592/files/4607987350.pdf
    • https://cdn.shopify.com/s/files/1/0437/7971/9330/files/hipoplasia_del_cuerpo_calloso.pdf
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/9412856986.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/the_sims_deluxe_edtion.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/agile_software_development_with_scrum_mike_beedle.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_off00008e0b.bin
83a84fb4f6c8a9e4d703f91580e60aa3fa08c3efe3b58019abbfe47b4d86e81b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E0B 5452 bytes
font_01_sfnt_off0000a0b7.bin
7877f68522e4cd344741a846ae1ad8464f61d1d56ba2fb524a13b03fd713901d
pdf-font-stream PDF embedded font (sfnt) at offset 0xA0B7 10240 bytes
font_02_sfnt_off0000c3e8.bin
43dd7310e986e37c0562d6efd2a67b6291a0d41fa892ecd43b306c3e7231f7b7
pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E8 16148 bytes