Malicious PDF — malware analysis report

Static analysis result for SHA-256 d61e2096a428a497…

MALICIOUS

PDF

46.7 KB Created: 2020-08-18 20:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2903c3495aa44a0fd6ea36adcd81204 SHA-1: 33d17aa221c8eaa5879a5e65754e56a309557dfb SHA-256: d61e2096a428a4977cb53f7e18bbd0fcee9e0f764278d68d12457cade8119e7e
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector (ttraff.cc). The document body, though heavily obfuscated, contains the string 'Free resume illustrator template' and the malicious URL, suggesting a lure to trick users into clicking the links. The ML classifier strongly indicates maliciousness, and the presence of a redirector link confirms a malicious intent to lead the user to a harmful 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.cc/pify?keyword=free+resume+illustrator+template
    • http://zuzudasu.clintontrail.com/uploads/1/3/0/7/130775164/tafuvu.pdf
    • https://cdn.shopify.co
    • https://cdn.shopify.com/s/files/1/0434/0062/6325/files/16680387257.pdf
    • https://cdn.shopify.com/s/files/1/0428/9986/5756/files/biological_warfare_agents.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/sufivojekazuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6086/2882/files/duzubigolikarevifejekig.pdf
    • https://cdn.shopify.com/s/files/1/0431/3799/0818/files/88898863091.pdf
    • https://cdn.shopify.com/s/files/1/0428/5225/3863/files/vowopinanedifameninifaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/46328616363.pdf
    • https://cdn.shopify.com/s/files/1/0433/4357/7246/files/fitness_tracking_android_app.pdf
    • https://cdn.shopify.com/s/files/1/0431/7960/6176/files/libros_dr._armando_alducin.pdf
    • https://cdn.shopify.com/s/files/1/0431/8635/6375/files/18226546735.pdf
    • https://cdn.shopify.com/s/files/1/0436/3422/9398/files/bazapozut.pdf
    • https://cdn.shopify.com/s/files/1/0434/1370/0764/files/1977399244.pdf
    • https://cdn.shopify.com/s/files/1/0429/6382/8895/files/60690126082.pdf
    • https://cdn.shopify.com/s/files/1/0431/6961/1930/files/20487103914.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_off00007a5b.bin
7cc4257920d31fa0c48bbb6d343cd31d04fc026067d26fd4bd7c040567da5e4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5B 4920 bytes
font_01_sfnt_off00008afb.bin
3465af7821ad8cfe7ae66f1e763c6f3b5b0e46ae35ae548fc6176c3bb09c4084
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AFB 10176 bytes