Malicious PDF — malware analysis report

Static analysis result for SHA-256 d166ca5921572bff…

MALICIOUS

PDF

46.3 KB Created: 2020-08-19 15:18:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 359ef8041d6387de8c7bc204ac4b9357 SHA-1: 22c306d4ebb6d51399d27deb23d8fc4c1332c20f SHA-256: d166ca5921572bff16caf7ebde8a649d69801febf55fc8e9125f5290124eb4c6
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The primary malicious URL identified is https://ttraff.cc/pify?keyword=aloisia+horse+form, which likely serves as a redirector to further malicious content. The document body contains garbled text but includes the same malicious URL.

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=aloisia+horse+form In PDF document text
    • http://kedajid.drthatchtutors.com/uploads/1/3/1/6/131606727/siwufojevev.pdfIn PDF document text
    • http://pavaja.lachozaspa.com/uploads/1/3/1/3/131382486/pomeperakawewez.pdfIn PDF document text
    • http://ramanoguv.patsflyfishing.com/uploads/1/3/2/8/132814476/66ab241a.pdfIn PDF document text
    • http://files.hancockseacadets.com/uploads/1/3/1/4/131408798/vebas_gijexarobosenu_puwuvufabikix_kuzibebovaz.pdfIn PDF document text
    • http://dupes.mothersmilkpod.com/uploads/1/3/1/4/131406665/negifopuzusoju.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/1/0431/4962/3462/files/rinumip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9922/6279/files/77100376452.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5395/6758/files/68116193217.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/71955753551.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1921/4756/files/80020605689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7831/1318/files/change_opacity_background_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/lawudabudejowadiruti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0083/7782/files/zifidisujivowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/gevuwoxototu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6542/5563/files/flight_hollywood_tamil_movie.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 2

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_off00006e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E44 4996 bytes
SHA-256: d238529bc38427cd480307623a4e6d4a717b7918c1349d9476db992a6f46592b
font_01_sfnt_off00007f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F13 14496 bytes
SHA-256: c78a5e4d96aa702473e6ddc25805bc82d899ae865eb7ca061c371bc373a7be20

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