Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e5deb1f19aa8463…

MALICIOUS

PDF

42.1 KB Created: 2020-08-22 04:42:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bec6c19d70b9cf9e5d3d4dcd53a542c2 SHA-1: 8fd85e78c90832bc0f8eb7e24fb3777ced72cf08 SHA-256: 0e5deb1f19aa8463eeca16d9c01b35c4cd53fdfd09f33e4d6c0df2be3ddcf92a
162 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a free template for a fire evacuation plan. This link points to `https://ttraff.ru/pify?keyword=free+template+for+fire+evacuation+plan`, which is flagged as malicious. The document also contains a large number of external PDF links, many of which are hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=free+template+for+fire+evacuation+plan
    • http://files.wewillcureals.com/uploads/1/3/1/4/131408798/jizekuvijugise_mozavam_wufitiwubodop_kobisapivepeluk.pdf
    • http://files.thequeensmagnet.com/uploads/1/3/1/6/131637679/mazinepi-dudob.pdf
    • http://files.healthandwellnessforum.org/uploads/1/3/1/4/131454620/xukuvotufesixa.pdf
    • http://vufesimi.warriorweekend.net/uploads/1/3/1/3/131383544/3078261.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8380/0474/files/bellman_ford_algorithm_python.pdf
    • https://cdn.shopify.com/s/files/1/0438/3319/6706/files/pilapetapuxesomugomezudil.pdf
    • https://cdn.shopify.com/s/files/1/0427/8062/3015/files/pobade.pdf
    • https://cdn.shopify.com/s/files/1/0428/8138/4604/files/43493916443.pdf
    • https://cdn.shopify.com/s/files/1/0439/0184/5659/files/windows_meadia_player_9.pdf
    • https://cdn.shopify.com/s/files/1/0465/8806/8005/files/stool_microscopic_examination_report.pdf
    • https://cdn.shopify.com/s/files/1/0455/4902/7493/files/68372865571.pdf
    • https://cdn.shopify.com/s/files/1/0438/6213/0848/files/game_laptop_god_of_war_2.pdf
    • https://cdn.shopify.com/s/files/1/0434/1386/4604/files/7_days_to_die_rotting_flesh.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_off00006743.bin
ad6131255e269b46933c7f7ecbbe454730aef8cdf43db84d7b3b0a2d7b52ae35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6743 5000 bytes
font_01_sfnt_off00007838.bin
b181415373b51c08e3a2206cdcca2a29df3cc8dc1896ff40b9b70dcc7222420c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7838 10308 bytes

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