Malicious PDF — malware analysis report

Static analysis result for SHA-256 012c1d34c4f42326…

MALICIOUS

PDF

39.4 KB Created: 2020-08-21 01:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddec31fb8d1b50859bcb08325b5adb19 SHA-1: 9bd2142cfa828203c328e201d626debf60931ad0 SHA-256: 012c1d34c4f42326b9d06e26642194d402e1c049ba1a7f180166c434e4259fc9
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure at 'ttraff.com'. This suggests the document is designed to lure users to malicious sites. The ML classifier strongly supports the malicious verdict, and the presence of many external links indicates a link farm strategy.

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=baaton+ko+teri+song++ringtone
    • http://files.intentionalmba.com/uploads/1/3/2/7/132710690/9910435.pdf
    • http://files.teatimewithnaomi.org/uploads/1/3/1/3/131379477/2733184.pdf
    • http://files.clearlivingconsulting.com/uploads/1/3/1/4/131483279/rutajuvixige-ranerututavir-busov.pdf
    • http://files.wpleli.com/uploads/1/3/0/7/130775953/4493208.pdf
    • http://files.7lakesboatrentals.com/uploads/1/3/2/6/132681156/9664124.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0451/4791/4394/files/10038130409.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/53112310649.pdf
    • https://cdn.shopify.com/s/files/1/0438/5406/9910/files/incentive_plan_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/9348/1889/files/35407395180.pdf
    • https://cdn.shopify.com/s/files/1/0437/8542/0949/files/gofajewajimube.pdf
    • https://cdn.shopify.com/s/files/1/0441/1044/6744/files/bonfiglioli_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0433/9073/0405/files/32618007507.pdf
    • https://cdn.shopify.com/s/files/1/0435/1596/9688/files/jinozofoxemukunuxupevapik.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/how_to_save_a_twitter_gif.pdf
    • https://cdn.shopify.com/s/files/1/0455/4794/6149/files/sql_server_management_studio_manual_espaol.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_off00005282.bin
de8a1ba913eb93a01b2f12a48eff5b90f43a928034e486fa264ec18d71b5c441
pdf-font-stream PDF embedded font (sfnt) at offset 0x5282 4932 bytes
font_01_sfnt_off00006356.bin
ea747b9fc8f90ba386f5cbe1dc8fb22370245212a6055830a8c1d2b5fe664ca0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6356 13704 bytes