Malicious PDF — malware analysis report

Static analysis result for SHA-256 72fbd57d103e71ef…

MALICIOUS

PDF

40.5 KB Created: 2020-08-30 14:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74a33f6a066ecd8783cff8a6676c9629 SHA-1: bcc69d5c8d93f1439f1073cdb348c4b57c8d5a5f SHA-256: 72fbd57d103e71ef004d89653650f11fb4b77bfc3f3f14d1395371cf129abd1b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which are SEO-themed and point to Shopify. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to disguise a malicious link as a search result for a PDF. This indicates a phishing attempt to redirect users to malicious content.

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/wix?keyword=the+final+quest+by+rick+joyner+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5234/2184/files/despacito_tablature.pdf
    • https://cdn.shopify.com/s/files/1/0433/0445/2246/files/cellophane_sheets_wholesale.pdf
    • https://cdn.shopify.com/s/files/1/0465/1230/8382/files/wumituroneja.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dipipopiluniwewikojidil.pdf
    • https://cdn.shopify.com/s/files/1/0430/2602/2557/files/4486420747.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad796a46abf149ef8058e49501923ca8.pdf
    • https://cdn.shopify.com/s/files/1/0463/0570/6144/files/ebru_gnde_mstehak.pdf
    • https://cdn.shopify.com/s/files/1/0430/1727/3497/files/zafejevigipizanixuvimorex.pdf
    • https://cdn.shopify.com/s/files/1/0433/4649/3605/files/rexuxitavivawopim.pdf
    • https://cdn.shopify.com/s/files/1/0435/6171/3813/files/90770545957.pdf
    • https://cdn.shopify.com/s/files/1/0432/7361/7576/files/kekidinotatujamalinizad.pdf
    • https://cdn.shopify.com/s/files/1/0435/8828/8670/files/genetic_mutations_pogil_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/70762245685.pdf
    • https://cdn.shopify.com/s/files/1/0436/1011/2163/files/because_of_your_love_phil_wickham_chords.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_off00006026.bin
cb16354408a784bbba961f547b4489b8a686d1e192a45114cecdabb34a7213be
pdf-font-stream PDF embedded font (sfnt) at offset 0x6026 5700 bytes
font_01_sfnt_off00007383.bin
c54be668135e94601f7fbdb3c34cd4fde943d34dc0a06a396915902687c593f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7383 10164 bytes