Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6cc557ded44592f…

MALICIOUS

PDF

40.9 KB Created: 2020-08-04 20:32:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2bd73ca72b3828e03403087c4f41eef7 SHA-1: 4ae5a579a0900310db0d01193a34335b53827e4f SHA-256: d6cc557ded44592f59e0456a83ea2197453fd34596b3744e9e8986cf1c55b4ab
194 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, `https://ttraff.cc/pify?keyword=mathe+bruchrechnen+aufgaben+pdf`, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The presence of numerous links, including those to Shopify domains, indicates a link farm designed to obscure the ultimate destination and potentially leverage benign-looking domains for malicious purposes.

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=mathe+bruchrechnen+aufgaben+pdf In PDF document text
    • http://files.tide-lander.com/uploads/1/3/0/8/130874633/5276751.pdfIn PDF document text
    • http://files.sphsmusicboosters.com/uploads/1/3/1/4/131482915/ec4ec792.pdfIn PDF document text
    • http://files.sparklecleaning.net/uploads/1/3/0/8/130874205/3d28f.pdfIn PDF document text
    • http://files.radio91.net/uploads/1/3/0/8/130814466/6101489.pdfIn PDF document text
    • http://belarotu.tlcsupportservices.org/uploads/1/3/0/8/130874524/kusiji.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/1/0429/3728/6812/files/wow_encrusted_coin_vendor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5638/0574/files/garvin_nuvi_760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2341/6995/files/haunted_chuck_palahniuk_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5210/3845/files/gemagubitutitukisebe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0560/6049/files/statistical_functions_in_excel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9476/8792/files/lokusifupepodenofomitolat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/dizovibolikumimerar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nozawilod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6845/6086/files/34647733678.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 4

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_off00005f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F44 5352 bytes
SHA-256: a9cb6439be3bbefb6bea49de9d0e5877aa1b7670b0c817ca2a1f6d4e8aff35bf
font_01_sfnt_off0000717f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x717F 10812 bytes
SHA-256: 919065d9826b598929b7a03f5115781e08d2192c8108d4446cacf9f80c225576

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