Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af1b6bc65d243a3…

MALICIOUS

PDF

40.0 KB Created: 2020-08-04 08:31:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bd36d338eb82145e0341da4479b9fd1 SHA-1: f39db30828d5029131958e47f47877bbfebdbe44 SHA-256: 2af1b6bc65d243a39d33a189ee4abded602aeea8307585dc6c75c2e21184a2ff
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating it's a malicious redirector link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=bellman+adaptive+control+processes+pdf, which is likely used to direct users to malicious content. The ML classifier also strongly flagged this PDF as malicious. The document body appears to be obfuscated or corrupted, but the presence of numerous links suggests a social engineering or redirection attack.

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.ru/pify?keyword=bellman+adaptive+control+processes+pdf
    • http://files.notanuffibizans.com/uploads/1/3/1/3/131380953/e07711db6b23d7.pdf
    • http://mobajav.singingsawpress.com/uploads/1/3/1/3/131380213/00d70fa6a.pdf
    • http://files.nfp-excellence.org/uploads/1/3/1/8/131857115/nugajapiluw.pdf
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/47268150470.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/55538580944.pdf
    • https://cdn.shopify.com/s/files/1/0432/2718/5309/files/givukumogugavaf.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5805/files/lacrosse_craigslist_org.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/womosoravitixugefiwil.pdf
    • https://cdn.shopify.com/s/files/1/0427/7963/9967/files/6908497697.pdf
    • https://cdn.shopify.com/s/files/1/0429/9633/4753/files/visual_studio_change_project_name.pdf
    • https://cdn.shopify.com/s/files/1/0439/8402/7806/files/masamiwaserelaroxigav.pdf
    • https://cdn.shopify.com/s/files/1/0431/9880/8224/files/60510407932.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2088/files/74281823243.pdf
    • https://cdn.shopify.com/s/files/1/0434/4732/0728/files/88582769763.pdf
    • https://cdn.shopify.com/s/files/1/0433/5150/7094/files/sekopabe.pdf
    • https://cdn.shopify.com/s/files/1/0430/2379/4339/files/26690185732.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_off000050b6.bin
f3b001fe4974da2c4a27943ae8421e8f1d27681b4de30cb5817eba8b0dc71744
pdf-font-stream PDF embedded font (sfnt) at offset 0x50B6 5200 bytes
font_01_sfnt_off00006243.bin
5c7903fb2c42d7647ea0a774c1fc9e766e2c728ded9ad6b6015999fa2def9ff3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6243 10096 bytes
font_02_sfnt_off000084cb.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x84CB 4324 bytes