Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fcd456a61cb0710…

MALICIOUS

PDF

45.1 KB Created: 2020-08-22 03:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7524b8d91a030aaa6c1933145bca5ca8 SHA-1: 822972419a9a70c963562a5cacba08980f5d97c5 SHA-256: 6fcd456a61cb0710c31fd494ffc4c9475baa8822b26c6e6eb3ab37ecdb287baa
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. It also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are benign Shopify links but several point to unknown domains. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be directing users to a malicious site via the 'ttraff.com' URL, likely for a phishing or malware download attempt.

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=common+topographic+map+symbols+worksheet
    • http://falaregom.theflightproject.org/uploads/1/3/1/6/131606069/zevuzifekilifuv_janogeme.pdf
    • http://files.tracylarkindesign.com/uploads/1/3/1/4/131437370/3569942.pdf
    • http://mozoxeg.team-change.com/uploads/1/3/1/4/131412290/modegavimurufiruwun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8376/7713/files/9th_class_chemistry_notes_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/15000_useful_english_phrases.pdf
    • https://cdn.shopify.com/s/files/1/0430/7438/8119/files/xuwojuka.pdf
    • https://cdn.shopify.com/s/files/1/0444/6031/0695/files/web_page_development_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7352/files/39747171865.pdf
    • https://cdn.shopify.com/s/files/1/0434/8474/1798/files/sabiti.pdf
    • https://cdn.shopify.com/s/files/1/0430/0200/3619/files/82390505821.pdf
    • https://cdn.shopify.com/s/files/1/0430/6436/1113/files/togekajakisuguvumoxowik.pdf
    • https://cdn.shopify.com/s/files/1/0447/7868/4573/files/38219777586.pdf
    • https://cdn.shopify.com/s/files/1/0431/0469/8535/files/bacteriology_short_notes.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_off00006b59.bin
e972737ff972de402cf0bc0bfc0965a7e875f5724e6b5dd3b0c1cf5e6a2ddc6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B59 5652 bytes
font_01_sfnt_off00007e7a.bin
0183d55347304d9d88dcf3d3c20aa244df72471f2c1cf9d053ff8d34fa39446a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E7A 13036 bytes