Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eba3e979c9039b3…

MALICIOUS

PDF

45.5 KB Created: 2020-08-07 21:19:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0737f43179ac58d606d50495acada6a SHA-1: 7fa4540a45d9ab2c3941b52f06c89d12cb3e6de2 SHA-256: 3eba3e979c9039b312756ae42ead15a849bd4b825b0b6606588b8ab7a626323b
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs hosted on Shopify and other domains, suggesting an attempt to manipulate search engine results or lure users to malicious content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/pify?keyword=cbrn+usmc+pdf
    • http://biwevani.recapinc.net/uploads/1/3/1/0/131069839/vopemewaz-tudoremefazat.pdf
    • http://files.creaghnsonline.com/uploads/1/3/1/3/131398323/zodoge-wusinizetes.pdf
    • http://files.thriveglenville.com/uploads/1/3/0/9/130969922/4365296.pdf
    • https://cdn.shopify.com/s/files/1/0431/8176/8864/files/48880480972.pdf
    • https://cdn.shopify.com/s/files/1/0430/0098/7801/files/93579790887.pdf
    • https://cdn.shopify.com/s/files/1/0434/4909/0200/files/rite_temp_thermostat_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/6262/3394/files/49258750726.pdf
    • https://cdn.shopify.com/s/files/1/0433/4583/8232/files/96709521005.pdf
    • https://cdn.shopify.com/s/files/1/0437/6847/9901/files/ranosomukujulu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/vifomop.pdf
    • https://cdn.shopify.com/s/files/1/0431/5480/0796/files/43070242324.pdf
    • https://cdn.shopify.com/s/files/1/0434/2910/1735/files/how_to_check_ping_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0440/7053/5318/files/17760870127.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/61225949179.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_off00006868.bin
a477d942b93465ce05cc13466acb4ec1a4efed2740751076a75e3840acbe1364
pdf-font-stream PDF embedded font (sfnt) at offset 0x6868 4748 bytes
font_01_sfnt_off00007855.bin
44797b5e90c10420dceab3c082d884280b54555ad6862fcee5005f3c99d91238
pdf-font-stream PDF embedded font (sfnt) at offset 0x7855 10152 bytes
font_02_sfnt_off00009b12.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B12 4324 bytes