Malicious PDF — malware analysis report

Static analysis result for SHA-256 66ca37eb82aea34f…

MALICIOUS

PDF

48.3 KB Created: 2020-08-04 20:27:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1c4cb3a1cb313eb986550e702bf6f46 SHA-1: 4b9306a6712619711c75e926c3b6ddc719b31835 SHA-256: 66ca37eb82aea34f5e891e3b8e9649443f0bc61885a25ce3aa4de9bf3f9ef3e8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely used to funnel victims to malicious content. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=valmiki+ramayanam+ayodhya+kanda+in+telugu+pdf
    • http://files.thefashionanalyst.com/uploads/1/3/1/3/131383624/wezunawe.pdf
    • http://files.atlasandanchortattoo.com/uploads/1/3/0/7/130775813/vefokipi_bulifo_rovubugona.pdf
    • http://files.johnpatrickhunter.com/uploads/1/3/1/3/131383664/fimibulepavil-bozewuxavodes-toxolozuvuje.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0430/6986/6133/files/nokipaxuxan.pdf
    • https://cdn.shopify.com/s/files/1/0430/9699/8048/files/domek.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8106/files/metabolisme_anaerob.pdf
    • https://cdn.shopify.com/s/files/1/0431/2724/2914/files/criminal_procedure_law_notes.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/tisavekibifetasemibaxipov.pdf
    • https://cdn.shopify.com/s/files/1/0437/5035/9194/files/suzabodekusogawavemukosib.pdf
    • https://cdn.shopify.com/s/files/1/0438/3975/0294/files/3475436764.pdf
    • https://cdn.shopify.com/s/files/1/0435/6957/8147/files/guvovovakafilararo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/12926650680.pdf
    • https://cdn.shopify.com/s/files/1/0432/2738/1920/files/lezepixawefem.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mowelikuzamutaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0822/8508/files/agriculture_tools_names.pdf
    • https://cdn.shopify.com/s/files/1/0430/7084/9181/files/20981003504.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058ed.bin
5f5caf2e05f2ae53fba6186497b7eaf5784e7aa8dd92fd2035eb63f8a9907693		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58ED 5408 bytes
font_01_sfnt_off00006b39.bin
0a7b2a68e5579408fc26507e9c02f4df7e76764e594d1098a8e6f90d8a82de12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B39 13452 bytes
font_02_sfnt_off00008f30.bin
fb41d8e644c2948ec3925147cadd9fbd2e4fa25fc1b77f15773cf7aaf1458540		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F30 10384 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.