Malicious PDF — malware analysis report

Static analysis result for SHA-256 c321dc5e6312405d…

MALICIOUS

PDF

45.9 KB Created: 2020-08-24 10:25:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: adcb64e90dea362d6a7e05933ca36896 SHA-1: 5d5ef0e674f9e3286ffa35f4e4b09271663f9372 SHA-256: c321dc5e6312405d45c4f82d9946a5e0009873896e7be1e5bc20ec4d3c33fe6e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=online+programming+learning+platform'. This suggests the document is designed to trick users into visiting malicious sites under the guise of educational content. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, limiting the analysis of further stages.

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.com/pify?keyword=online+programming+learning+platform In PDF document text
    • http://xedon.alittlebitofhappy.org/uploads/1/3/1/3/131383309/nukezewav.pdfIn PDF document text
    • http://files.prezziessugarloaf.com/uploads/1/3/1/4/131438151/e895e0a5.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/1/0432/4478/1735/files/evine_channel_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5865/8456/files/apartment_1303_imdb_parents_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/64090605543.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2811/9706/files/56923385350.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5124/5987/files/android_studio_example_project.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1044/9820/files/cartea_amantele_trecutului.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/barapozominowag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4188/1253/files/22292894171.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0016/8607/files/gumixadidevojozutamis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0716/5095/files/xemasujakunexipulupelov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1750/2869/files/10172571358.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81579197248.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3339/5353/files/navarre_bible_online.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67DC 4856 bytes
SHA-256: c8c94526dd3169bffc3d18ae646c2da596c72aa7dfcea54d73e7e4b2a3b58a19
font_01_sfnt_off00007846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7846 10676 bytes
SHA-256: 3f2eaf7d423454c703826b486a949b29dfabd32cc6a08148ba20f3f3791f752c
font_02_sfnt_off00009c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C4C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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