Malicious PDF — malware analysis report

Static analysis result for SHA-256 88ea71d0539dbf7a…

MALICIOUS

PDF

41.9 KB Created: 2020-08-03 11:49:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8edeac62ce9d33218c7b438bc4bdfa30 SHA-1: 3cdef66fb40d0ef5ec40a5661dae5594a50360b9 SHA-256: 88ea71d0539dbf7af109ab4c6dd44a30c7a590573f91325d3d4b2ed5e7444d40
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.cc. This URL is embedded within the document body, disguised as a tutorial. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The primary malicious URL is likely intended to redirect the user to a phishing or malware distribution site.

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.cc/pify?keyword=anaconda+python+tutorial+windows+pdf
    • http://files.esercizi-inglese.com/uploads/1/3/0/7/130776821/a420601e.pdf
    • http://files.clarinetrepairs.org/uploads/1/3/1/0/131070080/28d25897f0.pdf
    • http://files.booksforsociety.com/uploads/1/3/1/0/131069961/83ef1b3b.pdf
    • http://files.devlindesignstudio.com/uploads/1/3/0/8/130874246/ritufuzaw.pdf
    • http://files.gracehouseministry.com/uploads/1/3/0/7/130775063/50f5e014119.pdf
    • https://cdn.shopify.com/s/files/1/0433/6294/3127/files/divanowililemaru.pdf
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/youtube_to_mp3_fiber.pdf
    • https://cdn.shopify.com/s/files/1/0438/4695/9261/files/missing_render_texture_extension.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3979/files/molejabowagakojowagemujub.pdf
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/bukejopojewuxel.pdf
    • https://cdn.shopify.com/s/files/1/0433/4636/2527/files/xutaferibiritogefu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kesazemoluvumexon.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5397/files/46077408293.pdf
    • https://cdn.shopify.com/s/files/1/0432/8439/8236/files/27225275817.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/sinaxemitugew.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/58247892811.pdf
    • https://cdn.shopify.com/s/files/1/0435/5699/5233/files/rugurulolij.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_off000065ca.bin
56f51b94d3269fcd95867cc729756fe481be25de7886d217667f4ea953a9be73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65CA 5424 bytes
font_01_sfnt_off00007853.bin
d1bec5d45c587047893471c9e0c8ac10ae75e9c68d2ec4c0b591e94dba239a24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7853 10036 bytes

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