Malicious PDF — malware analysis report

Static analysis result for SHA-256 dffd428487c1acd5…

MALICIOUS

PDF

42.4 KB Created: 2020-08-29 06:13:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36d094f8f422a49fb8913f93fc54cb89 SHA-1: 361ed0377f83a90bf2c3e31162200f174a2868c9 SHA-256: dffd428487c1acd5c2dc5046307178979928567c2cf5528f98af8a84ce4e69ec
152 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which point to Shopify domains. The ML classifier strongly indicates maliciousness. The presence of the 'mining leveling guide legion' keyword in the malicious URL suggests a lure, potentially for a phishing or scam operation.

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.ru/wix?keyword=mining+leveling+guide+legion
    • https://static.usrfiles.com/ugd/b8c837_f1bf5fb15100465fa496c5dc6c6f9fcf.pdf
    • https://static.usrfiles.com/ugd/b8c837_51fe41c0722f429dbb50cc7821b345d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2547b1021bf48eeb844fbaefa0c135d.pdf
    • https://static.usrfiles.com/ugd/b8c837_a8ad3ecf65584627bc5e3562a191cc8c.pdf
    • https://cdn.shopify.com/s/files/1/0429/3374/7878/files/62520303499.pdf
    • https://cdn.shopify.com/s/files/1/0438/7130/5883/files/3059828581.pdf
    • https://cdn.shopify.com/s/files/1/0462/2453/9802/files/38332444636.pdf
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/energia_eolica_en_costa_rica.pdf
    • https://cdn.shopify.com/s/files/1/0460/1954/3199/files/zubili.pdf
    • https://cdn.shopify.com/s/files/1/0430/3034/7938/files/27014073346.pdf
    • https://cdn.shopify.com/s/files/1/0434/1504/4252/files/40081840454.pdf
    • https://cdn.shopify.com/s/files/1/0432/7620/6238/files/35060560351.pdf
    • https://cdn.shopify.com/s/files/1/0435/2540/6874/files/96857383291.pdf
    • https://cdn.shopify.com/s/files/1/0429/1556/1638/files/vurupoxovuj.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_off00006979.bin
92489e5031c2ded5dda50df427152184f061fc6dabe9f59f2f038269577672d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6979 4576 bytes
font_01_sfnt_off00007927.bin
8b8771f43cd513bac1e46ae79f24138be64596dde4fa5923ad725eb099fb9338
pdf-font-stream PDF embedded font (sfnt) at offset 0x7927 10464 bytes