Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aac0574e1e7e43a…

MALICIOUS

PDF

66.3 KB Created: 2020-08-24 13:33:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe9c0f0c56bc04929e690c122b7ef5dc SHA-1: 97a43409d204d634fc77f11993d26406088469a9 SHA-256: 6aac0574e1e7e43a56a559bb3169e6f0ca004e3d23b41950c6516220fa263612
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm used for SEO poisoning or to obscure the final 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.com/pify?keyword=anemia+ferropriva+pdf+usp
    • http://files.originalartworkdamienvenditti.com/uploads/1/3/1/4/131453144/7ae3c10f93.pdf
    • http://xafujed.affordingsurrogacy.com/uploads/1/3/0/7/130739017/9479181.pdf
    • http://files.alwaysgenialdental.com/uploads/1/3/0/7/130740524/vinogagixupaze.pdf
    • http://files.district146bands.com/uploads/1/3/1/4/131407445/6046404.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6195/9069/files/nenenonam.pdf
    • https://cdn.shopify.com/s/files/1/0460/5791/4523/files/kulowexowibifojub.pdf
    • https://cdn.shopify.com/s/files/1/0432/5448/1058/files/zepuwifepedori.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/75864893831.pdf
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/wanasosilobokulifi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3494/files/19061233383.pdf
    • https://cdn.shopify.com/s/files/1/0431/6315/6641/files/alter_ego_a1_french_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/6414/7609/files/60063316857.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5780/files/12009486533.pdf
    • https://cdn.shopify.com/s/files/1/0433/5491/4981/files/54129193688.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4ba.bin
e6086ffb9556bae629a82d7393fde8417c3d184252e2ad0eebe4e6573bfa4651
pdf-font-stream PDF embedded font (sfnt) at offset 0xC4BA 5204 bytes
font_01_sfnt_off0000d654.bin
a47ddbfb61352fa78fb4c219d83130b73ac0778e20f652838c7a7b0b39a837c4
pdf-font-stream PDF embedded font (sfnt) at offset 0xD654 11316 bytes