Malicious PDF — malware analysis report

Static analysis result for SHA-256 957f210735ed7164…

MALICIOUS

PDF

41.2 KB Created: 2020-08-31 03:27:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f95fbdee453b6ea6efd94884bc702a75 SHA-1: d63ac1f0119ff88668adbf717fb4470de464ea92 SHA-256: 957f210735ed71644a78638ab8b0fd9baddecc6dc84db7400ec59629497ff36f
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for 'Ebay for dummies 9th edition pdf'. This link, https://ttraff.com/wix?keyword=ebay+for+dummies+9th+edition+pdf, points to known malicious infrastructure. The document also hosts a large number of other PDF links, likely for SEO manipulation or to spread further malicious content. The ML classifier strongly supports the malicious verdict.

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.com/wix?keyword=ebay+for+dummies+9th+edition+pdf
    • https://static.usrfiles.com/ugd/f4de5e_060308c4d115412ca70e0c6e97e14e2e.pdf
    • https://static.usrfiles.com/ugd/67e251_06d2a4f39ada4df9a3ca7b78155c2bf0.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f045f1f5c8348eeb9a5d24a90b7582d.pdf
    • https://static.usrfiles.com/ugd/b8c837_c0d43d1519814115b32301c81109aad9.pdf
    • https://static.usrfiles.com/ugd/b8c837_84f3a972375442739521796887dddbbd.pdf
    • https://static.usrfiles.com/ugd/d17951_370b15cdebda407f835493ffcd505a16.pdf
    • https://static.usrfiles.com/ugd/2274a7_2344938f2fae46b08750ee222ea9b7d4.pdf
    • https://cdn.shopify.com/s/files/1/0431/0944/9884/files/64675367703.pdf
    • https://cdn.shopify.com/s/files/1/0428/4317/7126/files/battery_life_airpods_android.pdf
    • https://cdn.shopify.com/s/files/1/0428/3459/1907/files/53309151382.pdf
    • https://static.usrfiles.com/ugd/b444d4_451c383d9ec94807bc16c258815e489a.pdf
    • https://static.usrfiles.com/ugd/b8c837_f8247b8008014c66982ddd0acc608df6.pdf
    • https://static.usrfiles.com/ugd/b4609a_9c4a28f0f2cd46cfb0758a8411977271.pdf
    • https://static.usrfiles.com/ugd/02beb7_bafc092ac3eb498d8bd11e89d0bbc386.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_off000061ef.bin
8d51456f234c8aff1c10f075d6dd5706c110f48ac1d28b07816c8e475cf3b26b
pdf-font-stream PDF embedded font (sfnt) at offset 0x61EF 5604 bytes
font_01_sfnt_off000074d9.bin
2906f252da7a9ea6c72b0a42f7e22850c9331089f289cd58a8a8a1393357b638
pdf-font-stream PDF embedded font (sfnt) at offset 0x74D9 10492 bytes