Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f7137f8bd7f8737…

MALICIOUS

PDF

49.6 KB Created: 2020-08-03 03:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 96ebeccc435ab92d8a081e148f5f4510 SHA-1: 5a552bf16552308f980364edf7153c35c82a88fd SHA-256: 9f7137f8bd7f8737d4052fc1f5b5f1c520333fd2aeede833a0c5c4538a136d3f
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains a URL that points to a redirector, which is likely used to obscure the final malicious destination. The presence of numerous links to external PDFs, many hosted on seemingly unrelated domains, suggests a link farm designed to manipulate search engine results or distribute malware.

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.
  • 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=tyranids+painting+guide+pdf In PDF document text
    • http://files.pandeliascanaryyellowcompany.com/uploads/1/3/0/8/130874583/mepapedamokupajufum.pdfIn PDF document text
    • http://files.eccai.ca/uploads/1/3/1/8/131856134/lomukiretul-tujiwonuwenirez-sugenuzesakow.pdfIn PDF document text
    • http://files.bhpcd.org/uploads/1/3/1/4/131406827/918244.pdfIn PDF document text
    • http://files.julieannsfashionboutique.com/uploads/1/3/0/8/130814390/nemidume_jozilaresalav_munibuzomoriw.pdfIn PDF document text
    • http://files.jadeblackmore.com/uploads/1/3/2/6/132695694/380da5237.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3975/0294/files/fixupadadejoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1538/9855/files/wazutegom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4856/6933/files/quando_quando_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/lazixazuxobelebilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4157/0466/files/kolipenefuxagixudinixotem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0608/2717/files/vetesuxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6055/9013/files/simozajajatani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1076/8546/files/mavuwulanowowuxuvap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9631/7845/files/67950512633.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4576/3744/files/89001971308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0335/5034/files/defaweguzajilobiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8257/9110/files/66518594061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1423/3000/files/52778558162.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7564 5000 bytes
SHA-256: 8df502c40ad00590f974230baf60fc16428b9a508d9a726f3feaadc3b00c2b28
font_01_sfnt_off00008674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8674 10804 bytes
SHA-256: 0944b6622ea013edcd95299190bdbbe58c843a23c778c11865efa56c77e255ec
font_02_sfnt_off0000ab7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB7C 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333