Malicious PDF — malware analysis report

Static analysis result for SHA-256 12c2523bbc7366f1…

MALICIOUS

PDF

41.6 KB Created: 2020-08-28 06:40:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 328ddd8c365911ffc33de9e1ba8ab9e1 SHA-1: 633f7c1e8547fd426b9f6bb952d995691e4281ad SHA-256: 12c2523bbc7366f12de4e022b2cb08383552ff8e6aa83b80132efb9d127d1a09
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'jillian michaels bodyshred calendar pdf' and a suspicious URL, suggesting a lure for users to download or view malicious content. 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.link/pify?keyword=jillian+michaels+bodyshred+calendar+pdf
    • http://files.wildthingsbylindab.com/uploads/1/3/1/3/131379991/bumipakowemolijipi.pdf
    • http://files.karaites.org/uploads/1/3/1/4/131482950/zomanaxena_zunerizigiri_didivil_rakinimi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9731/7783/files/zonalokubepabujevi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9588/files/basic_communication_skills_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/3636/9318/files/website_templates_html.pdf
    • https://cdn.shopify.com/s/files/1/0431/3789/2509/files/54473831966.pdf
    • https://cdn.shopify.com/s/files/1/0464/5152/3752/files/99_herb_guide_rs3.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/voduzopasiputujugeboneri.pdf
    • https://cdn.shopify.com/s/files/1/0462/0989/2505/files/fewitu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0305/2191/files/vaxedalewuk.pdf
    • https://cdn.shopify.com/s/files/1/0436/9963/4326/files/fopinazopexavidovudiji.pdf
    • https://cdn.shopify.com/s/files/1/0464/8730/6392/files/hypertension_in_pregnancy_guidelines_2018.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_off0000622c.bin
3e08b047cf6d8350e870d9645d35b7cab0bbacb38e9c4ced790822cf89f2234f
pdf-font-stream PDF embedded font (sfnt) at offset 0x622C 5628 bytes
font_01_sfnt_off00007512.bin
eb114f20cd31208781e21d5dd60998ddeae121fb98391bf3df964cef9e665750
pdf-font-stream PDF embedded font (sfnt) at offset 0x7512 10164 bytes