Malicious PDF — malware analysis report

Static analysis result for SHA-256 0db4acba22cc08c9…

MALICIOUS

PDF

40.3 KB Created: 2020-08-05 17:25:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27ba7b9a78efc85494097118de91ce2d SHA-1: c67507b5a2fc74faad5ca888524b6742d232ca97 SHA-256: 0db4acba22cc08c9e5fd1c9fd889edf3be38c3250ab05bb9f6eecd79e1c1b127
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service, suggesting a link farm or SEO abuse for malicious purposes. The primary malicious URL identified is a redirector that likely leads to further malicious content. The document body, though heavily obfuscated, contains references to the ketogenic diet and the malicious URL, reinforcing the lure.

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.cc/pify?keyword=cetogenica+dieta+pdf
    • http://files.unitedmarinesystems.com/uploads/1/3/1/4/131407921/1463529.pdf
    • http://files.ckc3.org/uploads/1/3/1/4/131452977/nisataxo-semulatusijoter.pdf
    • http://files.kristinbrownelcamino.com/uploads/1/3/1/4/131453605/fitolujevejofe_vifadulinivo_temixawene_morevedise.pdf
    • http://files.egonbernhard.com/uploads/1/3/0/7/130775228/2242788.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/3278/7609/files/94459610100.pdf
    • https://cdn.shopify.com/s/files/1/0432/9963/5355/files/sozubowimizogarumemowi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wudivilijekeroleve.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75904593322.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/what_is_the_chilton_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0774/5958/files/k_episode_1_english_dub.pdf
    • https://cdn.shopify.com/s/files/1/0430/2051/7537/files/openssl_subject_alternative_name.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/tanatituse.pdf
    • https://cdn.shopify.com/s/files/1/0431/2255/7082/files/vukidelefuluz.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/15714154639.pdf
    • https://cdn.shopify.com/s/files/1/0434/4774/6710/files/3728157365.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_off00005f8f.bin
af752806a39a3937bf7ccdfe3cdddca520248caf5a944bd1e5c202786b47cc86
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8F 4920 bytes
font_01_sfnt_off0000706a.bin
ae32453543046cc0773fc963e114f1913d9a35a1ee3deb3a2a9e83d1a42694c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x706A 11208 bytes