Malicious PDF — malware analysis report

Static analysis result for SHA-256 186ff98566b1102e…

MALICIOUS

PDF

40.4 KB Created: 2020-08-19 09:06:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 40799550ff3373be80a96d8d56499319 SHA-1: 306ec921f0c7328d8b339c59ed9d7c0f05f208b3 SHA-256: 186ff98566b1102e03bdc732419ee420b5a8c267da0f0224eab6632e57977106
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, including one identified as a malicious redirector, which is also present in the document body. The heuristic firings indicate the PDF is designed to link to a large number of external PDFs, likely for SEO manipulation or to host malicious content. The primary malicious URL identified is https://ttraff.cc/pify?keyword=as+time+flies+by+answer+key, which is presented as an 'answer key' lure.

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=as+time+flies+by+answer+key In PDF document text
    • http://files.murphybocce.com/uploads/1/3/2/6/132695569/8b9557c431721.pdfIn PDF document text
    • http://files.autumnhype.com/uploads/1/3/1/4/131453384/sifigibit-nateximal-zesere.pdfIn PDF document text
    • http://ramegeb.sc4hffameatgoatproject.com/uploads/1/3/2/8/132814930/zilun.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/1/0431/8068/7524/files/sokelaludukodoriruv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0729/5140/files/84626331231.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5661/8911/files/caste_validity_application_form_marathi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5327/7589/files/28711035187.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38935964995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2677/6227/files/56946644688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4154/4600/files/20262895565.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8543/0945/files/69960437891.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 6

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_off0000540a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x540A 4976 bytes
SHA-256: 25e93232ac58d2278537c5149b42a206468547dc12f748121e431c32d5de752a
font_01_sfnt_off000064dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64DD 9940 bytes
SHA-256: 402a4ee1b9d737c7f2eaab143ce7fbf740def96a58d3bdf0cb8f16414598b887
font_02_sfnt_off000086d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86D5 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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