Malicious PDF — malware analysis report

Static analysis result for SHA-256 d78b85087d0f635e…

MALICIOUS

PDF

35.4 KB Created: 2020-08-22 02:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a17335698ce4a4dbf29f463064c1ff2c SHA-1: 1f88dc2118acd58563e082fce815209fd33e375d SHA-256: d78b85087d0f635e271a84482604d2ecf42522ac16e22f9dae72df7d689341bd
194 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URL points to a known malicious redirector, ttraff.ru, which likely serves as a gateway to further malicious content. The document body, though heavily corrupted, contains fragments of URLs and metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs. The presence of numerous external links, many pointing to Shopify, indicates an attempt to obscure the true malicious destination.

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.ru/pify?keyword=wrangler+outdoor+performance+utility+shorts In PDF document text
    • http://files.dylanrockon.org/uploads/1/3/1/8/131857117/jaroraj.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/1/0432/5598/8387/files/antonio_vivaldi_winter_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3631/9645/files/4279930290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8777/3342/files/attack_on_titan_manga_episode_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/nwod_mage_the_awakening.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/64053544232.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26450106566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4980/3162/files/lurajadiwuketikiwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5013/9801/files/negapavur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7447/7473/files/97020600604.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pekuxiwitijumowiviw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5091/8310/files/93243107074.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3062/3894/files/birth_certificate_amravati_municipal_corporation.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 1

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_off00004b8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B8F 5684 bytes
SHA-256: 5e9fec6f793f6ea79bb0cf1cdeb3af7e52ae935028e8410e6be14017cb2700e7
font_01_sfnt_off00005ecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECF 10060 bytes
SHA-256: bfa2282c8510435f62294912a1b19713801a8fe017226032991cf552fdb02ca7

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