Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd24043ec14a68c2…

MALICIOUS

PDF

40.7 KB Created: 2020-08-09 05:19:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0723635dd73953dc7e612c02687b5fed SHA-1: ef54b3773d993767dbd91f6b11fa2af3995c0e3f SHA-256: fd24043ec14a68c2f7b55437ba81a4ce66c46952cb81ffaa41638a163479bc05
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.com'. This redirector is likely used to obscure the final destination of the malicious payload. The ML classifier strongly supports the malicious nature of this PDF. The presence of numerous links suggests a link farm or SEO poisoning tactic to distribute the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=base+de+dados+em+pdf
    • http://files.mikesmale.com/uploads/1/3/1/4/131437636/nunuxezuza_dumojeposawixa_xafosuv_sagage.pdf
    • http://feguguwej.treshaimsportfolio.com/uploads/1/3/0/8/130815009/27a98a089b.pdf
    • http://mekajej.sheetalajmani.com/uploads/1/3/0/8/130814328/kepapum.pdf
    • http://nenim.jeremydhoward.com/uploads/1/3/0/8/130814328/8142664.pdf
    • https://cdn.shopify.com/s/files/1/0438/0937/4365/files/purinorinokukewilabobimo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4285/6344/files/xubaxedewojilofinebewi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2908/6876/files/31772594856.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6004/files/24838847093.pdf
    • https://cdn.shopify.com/s/files/1/0437/4046/3255/files/50341532305.pdf
    • https://cdn.shopify.com/s/files/1/0433/7926/1590/files/8474280989.pdf
    • https://cdn.shopify.com/s/files/1/0430/6560/6301/files/robert_bosch_automotive_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0432/1899/3307/files/zowurikijeparutumotazazo.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7741/files/acrobat_reader_files_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/2732/3301/files/reaccion_quimica_del_bicarbonato_de_sodio_y_vinagre.pdf
    • https://cdn.shopify.com/s/files/1/0435/4143/0440/files/55323435250.pdf
    • https://cdn.shopify.com/s/files/1/0427/4785/5004/files/38235431497.pdf
    • https://cdn.shopify.com/s/files/1/0435/0712/2342/files/zupava.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_off00005f2f.bin
36f3709b3d6f3cee2596b39a7594969a151a12638fa30fe3f323b7497b19392e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2F 5108 bytes
font_01_sfnt_off00007084.bin
5bf5971cce0bcc866dacc1362ead3ee99b749b1fca2360580e3eeb0316a1f428
pdf-font-stream PDF embedded font (sfnt) at offset 0x7084 12452 bytes