Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1ddac684b03b5b0…

MALICIOUS

PDF

49.1 KB Created: 2020-08-01 11:33:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5b9447cdd780589f4b737e240b2fe8b SHA-1: b47654bc3cc96cfd342340412b3777f469421086 SHA-256: c1ddac684b03b5b04154d037f1a6a6727bf07a13e25d48fce0b22ae411685f6b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document exhibits characteristics of a link farm and redirection attack. It contains numerous embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though partially corrupted, includes the phrase 'John deere la135 manual' and the URL that triggered the redirector, suggesting a lure to trick users into clicking malicious links. The ML classifier strongly supports the malicious nature of this PDF.

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=john+deere+la135+manual
    • http://files.chicagobonebroth.com/uploads/1/3/0/7/130775509/99251e5966f7635.pdf
    • http://files.supernaturalentertamitedproductions.org/uploads/1/3/1/4/131455883/visemomitowezij-fezaweku-xevut-kixivim.pdf
    • http://files.monawitt.com/uploads/1/3/1/3/131398008/8973515.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83142526711.pdf
    • https://cdn.shopify.com/s/files/1/0433/0605/7883/files/7854451747.pdf
    • https://cdn.shopify.com/s/files/1/0429/3397/7247/files/kifarurorixidikebazepo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6889/1040/files/tovosusobedopebetoteni.pdf
    • https://cdn.shopify.com/s/files/1/0429/4826/4089/files/tasemasawiranalomebaxube.pdf
    • https://cdn.shopify.com/s/files/1/0432/1158/7752/files/19506894976.pdf
    • https://cdn.shopify.com/s/files/1/0434/2890/5127/files/72720039252.pdf
    • https://cdn.shopify.com/s/files/1/0432/7063/5680/files/tovepudikud.pdf
    • https://cdn.shopify.com/s/files/1/0435/5663/4785/files/91714060857.pdf
    • https://cdn.shopify.com/s/files/1/0432/6644/1376/files/zovomiripikutopop.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061f7.bin
163e7688487377c9e12367907b2a0de09531e291ec9c48216371480ae8d7e2ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x61F7 5216 bytes
font_01_sfnt_off0000738a.bin
719d4a26022e0381422f8d16aae59a418cd76ae0fca8622665572a97d39a8356
pdf-font-stream PDF embedded font (sfnt) at offset 0x738A 13344 bytes
font_02_sfnt_off00009d78.bin
2d4c323027a084c26f5d652e789b327448f628d0dc6f25dd37171db16173ce12
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D78 17672 bytes