Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b3dbde9205904c…

MALICIOUS

PDF

37.8 KB Created: 2020-08-02 14:54:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a7778142bef230bbe397f182aef30c66 SHA-1: f3ed74911e16310f0434f2016d475bf649c7d35d SHA-256: 22b3dbde9205904c3376fb044c5ef780aa32a04d393bf2ba7ad61775e9a8bec7
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The heuristic firings indicate this is a link farm designed to direct users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted from this sample.

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=mystery+skulls+forever In PDF document text
    • http://files.sjaart.ca/uploads/1/3/1/4/131453060/5738446.pdfIn PDF document text
    • http://files.walkingandreading.ca/uploads/1/3/0/8/130813899/xopesu-pogabutalilet-levawetopeva-jidifodemurupev.pdfIn PDF document text
    • http://files.deejaylu.com/uploads/1/3/0/8/130874102/bozufogivelime.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/1/0428/2925/0719/files/ruwowuxovikunorope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5352/2850/files/jafejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6758/8252/files/80983094676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8641/3985/files/42421358982.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5009/8085/files/68928549003.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/defijetewinenuvag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/15290226400.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7222/5442/files/26799151742.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9014/0583/files/nusonavabopewinipijivoken.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7334/7488/files/98102680080.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/81995946931.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/32724422846.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5305/6149/files/9956484644.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/diablo_2_sorceress.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5577 4780 bytes
SHA-256: a06bac1b2c48c4769d38f0820b44e3e442b33c5476ad8a010aefb61a38132d41
font_01_sfnt_off000065e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E7 10944 bytes
SHA-256: 9a01d0f058b70e8388623f1e81cb4fd69f2c2c9d50b38ab2a40f479720f77694

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