Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5cf27b09d189f10…

MALICIOUS

PDF

44.6 KB Created: 2020-08-18 16:14:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 41decb0913435d6962723bc91141396a SHA-1: 2b33bdde2b2a709e3467bd681794e79d62c4cdef SHA-256: c5cf27b09d189f1058bbee56620f792e413960b6a80ddb3b72105d77e29fa66d
194 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO poisoning. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is disguised as an aircraft performance guide. This redirector likely leads to a malicious payload or phishing page. 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=aircraft+performance+group+users+guide In PDF document text
    • http://wagenijab.kctaste.net/uploads/1/3/1/4/131483281/3564831.pdfIn PDF document text
    • http://files.marystromerhanson.com/uploads/1/3/0/7/130739947/715126.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/1/0436/8711/6965/files/23548337493.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4301/3287/files/99774791463.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/vugijapefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2421/9293/files/13314431427.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/77026660836.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2063/9646/files/arris_port_forwarding.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6486/0575/files/vunazipewokovijamerudape.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4136/5922/files/islam_mein_aurat_ke_huqooq.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1003/8683/files/oklahoma_state_board_of_cosmetology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2873/4367/files/61529235669.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/pekonolejova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1900/2279/files/tadafulajas.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_off00007017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7017 5432 bytes
SHA-256: a52664f7fabc7f1c093083e4579c3f7d51867f2bda9bda8c09130c8abcec0533
font_01_sfnt_off0000826f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x826F 10276 bytes
SHA-256: ebb06870804f0cd80bac82a37d0710ffde702162f79c42e1628003a94143d9c6

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