Malicious PDF — malware analysis report

Static analysis result for SHA-256 a387cb019fee8585…

MALICIOUS

PDF

39.6 KB Created: 2020-09-08 21:14:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3c3a3f7a8402118ee4d223c763d3292 SHA-1: c4deafc191e9c03402ea16e1065489b0717ad1c8 SHA-256: a387cb019fee8585da1154db5dce50cb22153e7f0cb08a5f6b8c31b0d5907397
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.club, which is likely used to host further malicious content or phishing pages. The document body text, though partially obfuscated, includes the same URL and a song title, suggesting a lure to entice users to click the link. The presence of numerous other links to Shopify-hosted PDFs, while individually benign, contributes to a link farm pattern, potentially for SEO manipulation or to obscure the malicious destination.

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.club/wix?keyword=bhola+bhandari+baba+song
    • https://cdn.shopify.com/s/files/1/0439/2602/8456/files/45148922307.pdf
    • https://cdn.shopify.com/s/files/1/0462/9436/8416/files/zudoninonulidikebuto.pdf
    • https://cdn.shopify.com/s/files/1/0433/1978/7675/files/wiredulotolavekezu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5735/6710/files/20430928090.pdf
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/kofove.pdf
    • https://cdn.shopify.com/s/files/1/0437/0844/8919/files/endodontic_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/podebife.pdf
    • https://cdn.shopify.com/s/files/1/0430/9116/5333/files/guide_rail_vs_guardrail.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/12050845213.pdf
    • https://cdn.shopify.com/s/files/1/0440/4156/8421/files/wonuvijo.pdf
    • https://cdn.shopify.com/s/files/1/0438/5685/5190/files/54632342082.pdf
    • https://cdn.shopify.com/s/files/1/0461/5307/2803/files/xifotixevobibovatujadapul.pdf
    • https://static.usrfiles.com/ugd/6908d7_98db18fa768041b3972d81985730c85f.pdf
    • https://static.usrfiles.com/ugd/7c3584_8af6684968dd4223a586e813b261238c.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_off00004d08.bin
b81deb62f331479591a3c1681a51357581f6502fc28ea1d2400f0f0e34ed69e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D08 5276 bytes
font_01_sfnt_off00005eea.bin
4c0f37e10e2ebd3f606ab3e07035eb0be83376da5a5b8aa3ca81dab4b0f2c6cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEA 9736 bytes
font_02_sfnt_off00008077.bin
ec26016e39a4959eea54e78cb43457fcfaa2ba45d4bc4ea73e236d0652dfe94c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8077 4672 bytes