Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fba89065d069cf6…

MALICIOUS

PDF

39.8 KB Created: 2020-09-02 22:17:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e34b71f7f7bd0af5391e69d53ca09a6e SHA-1: d86087d2f7cab5d3ba2d59c7f08422d8d7c02ac2 SHA-256: 5fba89065d069cf698783317f56dedada88ebf97bb8af4d917ecdc5e78951827
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.me, which is likely used to obscure the final destination of the malicious content. The document body also contains a large number of links to PDFs hosted on Shopify, suggesting a link farm or SEO poisoning attempt to drive traffic to the redirector. The ML classifier also strongly indicated maliciousness.

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.me/pify?keyword=catholic+answers+apologist+salary
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1734/6976/files/milusopav.pdf
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/66251122437.pdf
    • https://cdn.shopify.com/s/files/1/0435/2403/0619/files/gigolikadedepis.pdf
    • https://cdn.shopify.com/s/files/1/0428/7430/6727/files/free_background_check_form_for_employment.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3609/files/27454056223.pdf
    • https://cdn.shopify.com/s/files/1/0432/6762/1028/files/57035939008.pdf
    • https://cdn.shopify.com/s/files/1/0430/7304/4642/files/44995913442.pdf
    • https://cdn.shopify.com/s/files/1/0434/4119/3127/files/xasebanowetoburiribexa.pdf
    • https://cdn.shopify.com/s/files/1/0433/5393/1944/files/cambridge_synonyms_and_antonyms_dictionary.pdf
    • https://static.usrfiles.com/ugd/c068f8_99b80a9edbe8444b9e9d9a4704604ea3.pdf
    • https://static.usrfiles.com/ugd/9a242c_6d1f089355df4b0bac2de146233277ef.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_off00005d8b.bin
af1682e65583d77da29f28ec75ad9bf217f6de0633b69d08720c19321d00ae80
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8B 5292 bytes
font_01_sfnt_off00006f99.bin
2e3c3492f0aab6908fd5284ed45baeca2ce0f830fc07a3b57ab0409ded7fb0a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F99 10304 bytes