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) First seen: 2026-05-09
MD5: c5b9447cdd780589f4b737e240b2fe8b SHA-1: b47654bc3cc96cfd342340412b3777f469421086 SHA-256: c1ddac684b03b5b04154d037f1a6a6727bf07a13e25d48fce0b22ae411685f6b
234 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 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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 In PDF document text
    • http://files.chicagobonebroth.com/uploads/1/3/0/7/130775509/99251e5966f7635.pdfIn PDF document text
    • http://files.supernaturalentertamitedproductions.org/uploads/1/3/1/4/131455883/visemomitowezij-fezaweku-xevut-kixivim.pdfIn PDF document text
    • http://files.monawitt.com/uploads/1/3/1/3/131398008/8973515.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83142526711.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0605/7883/files/7854451747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3397/7247/files/kifarurorixidikebazepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6889/1040/files/tovosusobedopebetoteni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4826/4089/files/tasemasawiranalomebaxube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1158/7752/files/19506894976.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2890/5127/files/72720039252.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7063/5680/files/tovepudikud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5663/4785/files/91714060857.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6644/1376/files/zovomiripikutopop.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F7 5216 bytes
SHA-256: 163e7688487377c9e12367907b2a0de09531e291ec9c48216371480ae8d7e2ad
font_01_sfnt_off0000738a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x738A 13344 bytes
SHA-256: 719d4a26022e0381422f8d16aae59a418cd76ae0fca8622665572a97d39a8356
font_02_sfnt_off00009d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D78 17672 bytes
SHA-256: 2d4c323027a084c26f5d652e789b327448f628d0dc6f25dd37171db16173ce12