Malicious PDF — malware analysis report

Static analysis result for SHA-256 df2d2f8c3d0fd6bc…

MALICIOUS

PDF

43.5 KB Created: 2020-08-22 04:12:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b7398f1106903c0be977a5a67d61e43 SHA-1: b5e615f0de366b8e5c5c3bf87cfdbdf58cadf182 SHA-256: df2d2f8c3d0fd6bce37df9d49ed22578bd06966233b718dd383669a00ee03ea3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious File

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically 'ttraff.cc'. Additionally, it contains a mass external PDF link farm, with many links pointing to Shopify domains. The ML classifier also strongly indicated maliciousness. The document body contains the primary malicious URL and several other PDF links, suggesting a lure to download further malicious content or engage in SEO manipulation.

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.cc/pify?keyword=allshare+cast+free
    • http://files.joycelynnhewitt.com/uploads/1/3/0/9/130969192/5520814.pdf
    • http://kajumana.timwilsonfineart.com/uploads/1/3/1/1/131164250/sigetutom_jusejefejotum_bosomifado_sutapowedagivez.pdf
    • http://rabiku.mancave4kings.net/uploads/1/3/1/3/131379296/disat.pdf
    • https://cdn.shopify.com/s/files/1/0434/6390/1334/files/89283555223.pdf
    • https://cdn.shopify.com/s/files/1/0437/3689/1544/files/rivegu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8427/4081/files/xanunavativuxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2636/6116/files/54601671174.pdf
    • https://cdn.shopify.com/s/files/1/0447/9811/6006/files/captain_america_infinity_war_wallpaper_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/8347/2802/files/kojirikinetotuwoxazem.pdf
    • https://cdn.shopify.com/s/files/1/0436/0703/1966/files/vocabulary_exercises_for_adults.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/40843976734.pdf
    • https://cdn.shopify.com/s/files/1/0427/9150/1990/files/43642436126.pdf
    • https://cdn.shopify.com/s/files/1/0434/2136/8472/files/waco_craigslist_org.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/50297502782.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_off00006c63.bin
95205fa7eb8ad83fa07dc9bfb55eab00b94cc3b6b42396722671cf5c74b0db50
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C63 4956 bytes
font_01_sfnt_off00007d2e.bin
1e81f0db7e020b5ee31d8eee56b92ff70c9a8af70535614f4d47b8f5b191aba0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2E 10716 bytes