Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c7fbb4b64fcb842…

MALICIOUS

PDF

33.5 KB Created: 2020-08-18 20:16:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8cb0753de2063f4deb90df73f3c7bf79 SHA-1: 082b675d2f1251681287d52f0d9628e0d98835be SHA-256: 5c7fbb4b64fcb842d660768836f1c6b1628b09b57c7e7445957570f7cabdc19f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to a redirector service that is flagged as malicious. The document body, though heavily obfuscated, contains the same redirector URL and a benign-sounding title, suggesting a lure. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating an attempt to drive traffic to potentially harmful sites.

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=manual+bath+bomb+press+machine In PDF document text
    • http://files.worldwarc.ca/uploads/1/3/0/8/130815095/xokevogetuwa.pdfIn PDF document text
    • http://files.sietinternational.com/uploads/1/3/1/0/131069789/5e7f39f98507d4b.pdfIn PDF document text
    • http://files.moonhawkvisions.com/uploads/1/3/1/4/131437636/7970345.pdfIn PDF document text
    • http://files.skintwalletsusa.com/uploads/1/3/0/9/130969695/jafubanurolapa_gamoporebi.pdfIn PDF document text
    • http://files.chickswithdecks.co.uk/uploads/1/3/2/6/132682819/dadedalofojurefof.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/1/0431/5738/9472/files/mewufes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7142/3135/files/craft_beer_cookbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1095/6196/files/zaxuwakab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/10438127842.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5594/6655/files/barisan_dan_deret_geometri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3871/9648/files/46365448161.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8448/9631/files/2303112813.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/592626504.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8321/9619/files/31458372546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/56210784347.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8158/1223/files/outback_nutrition_information.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 8

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_off00004572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4572 5316 bytes
SHA-256: e95e6b4a0715da3be2fc1fc90ddafffc07d3f387b3e6f5db6d3649c397e16eb7
font_01_sfnt_off00005754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5754 9944 bytes
SHA-256: 3c017638bc52fbc44028481f9343cb773efd708929e53ff2cbe17db2b5e289e4

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