Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb3b63540311b1eb…

MALICIOUS

PDF

33.0 KB Created: 2020-08-05 02:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b3158e57a29587bff96cb0386752a91 SHA-1: 00210a5f035bd65696b9650c6d7f9a6a28a3c250 SHA-256: eb3b63540311b1eb62238bb7f73fb1965d4a129b92234a2495c2ff23b1fb5530
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One critical heuristic identified a malicious redirector link, specifically 'https://ttraff.ru/pify?keyword=beauty+tips+in+malayalam+pdf+download', which is likely used to obscure the final malicious destination. The document body text and embedded links suggest a lure to download content, with the primary malicious link being the most critical IOC.

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=beauty+tips+in+malayalam+pdf+download
    • http://files.martachaffee.com/uploads/1/3/2/6/132680852/momexexorajerigi.pdf
    • http://files.worldtravelingfeet.com/uploads/1/3/1/3/131378990/9034742.pdf
    • http://fovaviz.livebreathelovecreate.org/uploads/1/3/0/8/130874064/luxozofag_jaweduz_sugafalirawe.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/nixafekipivulejukowovu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6575/1192/files/budakimowixupugubuwi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0096/1947/files/dobevuzuzusebilasaja.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/luvibuxunefipefijuli.pdf
    • https://cdn.shopify.com/s/files/1/0440/3150/8645/files/falazinake.pdf
    • https://cdn.shopify.com/s/files/1/0430/5456/3477/files/tivuxifabawupolivisinogo.pdf
    • https://cdn.shopify.com/s/files/1/0438/4194/5760/files/89736330822.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8549/files/27810241076.pdf
    • https://cdn.shopify.com/s/files/1/0431/1737/9750/files/nozokorugafatiwuf.pdf
    • https://cdn.shopify.com/s/files/1/0429/1385/7692/files/dopodapapoliziminewufolaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/4434/7799/files/napezoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/4233/3087/files/cementoenamel_junction.pdf
    • https://cdn.shopify.com/s/files/1/0431/3301/0081/files/watulexofaworinufuvaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/58221831069.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_off00004491.bin
0074ca3381dcd791edefe1a23a10da51afb1511020286c178d59244f3acd0cbb
pdf-font-stream PDF embedded font (sfnt) at offset 0x4491 5332 bytes
font_01_sfnt_off000056c4.bin
59a799dcef90d52129b9ea9b7ebef777368925347f604a78211779610ca9ed2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x56C4 9536 bytes