Malicious PDF — malware analysis report

Static analysis result for SHA-256 54801586b500a265…

MALICIOUS

PDF

63.5 KB Created: 2020-08-30 01:13:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d539b7ae78b08fdd12c25c7bf028b69 SHA-1: a67ef947bcc2dc7a59091719d406882e8cfe0ceb SHA-256: 54801586b500a2659265266bd5c8b8dc032d6d655e5b40cdda2da90ef8b83570
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 identifying a link to a known malicious redirector at 'https://ttraff.com/wix?keyword=ecuaciones+diferenciales+lineales+de+primer+orden'. The document body, though heavily obfuscated, contains this URL and references to academic topics, suggesting a lure to a malicious site. The presence of a large number of external PDF links also indicates a link farm, likely for SEO poisoning or traffic generation to the malicious redirector.

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/wix?keyword=ecuaciones+diferenciales+lineales+de+primer+orden
    • https://cdn.shopify.com/s/files/1/0435/1338/1028/files/57567726272.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/37236583081.pdf
    • https://cdn.shopify.com/s/files/1/0433/8873/1543/files/nariz_de_fumaa_do_touro_gif.pdf
    • https://cdn.shopify.com/s/files/1/0436/4101/2382/files/98836799165.pdf
    • https://cdn.shopify.com/s/files/1/0435/7970/3451/files/bewapugepezubanipipopilu.pdf
    • https://cdn.shopify.com/s/files/1/0436/3508/1374/files/antecedentes_internacionales_de_los_derechos_humanos.pdf
    • https://cdn.shopify.com/s/files/1/0431/3602/4742/files/tuseritanabupesomis.pdf
    • https://cdn.shopify.com/s/files/1/0429/1251/4201/files/57327311357.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/59976543481.pdf
    • https://cdn.shopify.com/s/files/1/0432/1230/8637/files/84534897800.pdf
    • https://cdn.shopify.com/s/files/1/0433/8935/4142/files/porujukitewexetutoka.pdf
    • https://cdn.shopify.com/s/files/1/0440/4248/5910/files/ketogenic_diet_recipes_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/1510/9794/files/barcos_que_vuelan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vibemegabixowosepabotabux.pdf
    • https://cdn.shopify.com/s/files/1/0430/7124/2391/files/33173153046.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c5f.bin
5ac4abab4ef8d4592239bddb4a860130e610350a911e064f32554cfc9f5c3569
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C5F 5060 bytes
font_01_sfnt_off00009d6e.bin
c8cd3e182e6ce57183e087cc44c97f161b679622ba6397c7231176b29f56f479
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D6E 15188 bytes
font_02_sfnt_off0000cbc9.bin
116e1aefc1bdc9fdbdc8bc4ca32ed8fc2a9096b6ae60b76e258fcc2d5524df3d
pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC9 16112 bytes
font_03_sfnt_off0000e09a.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0xE09A 4324 bytes