Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c854bf4adfdbdde…

MALICIOUS

PDF

54.1 KB Created: 2020-08-16 18:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a4ef4312e4c465ec33c83958342ed40f SHA-1: d31f629869ef2a80e7ffe7aaa291bea3fdc8a77f SHA-256: 9c854bf4adfdbdde1d63a4d39cb7c6024e7faec1b090af4d3028a90d6a7d6850
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.cc/pify?keyword=2018+english+films+free'. Another high-severity heuristic indicates an invisible link to 'http://files.medical-equipment-solutions.shop/uploads/1/3/1/4/131482931/6763599.pdf', suggesting a lure to a suspicious domain. The PDF also exhibits parser evasion techniques. The combination of these factors strongly indicates a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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=2018+english+films+free In PDF document text
    • http://files.medical-equipment-solutions.shop/uploads/1/3/1/4/131482931/6763599.pdfIn PDF document text
    • http://files.n947rv.com/uploads/1/3/0/7/130739783/5210881.pdfIn PDF document text
    • http://files.rosajoshi.com/uploads/1/3/2/7/132740277/8127169.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/1/0437/5671/6186/files/echo_server_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/vufawoguwapudogikani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/64328723905.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5743/0176/files/risajefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8334/9657/files/amiodarona_mecanismo_de_ao.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4160/3239/files/aectp_250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1653/1617/files/conjunctions_worksheet_3rd_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9614/9921/files/exercises_with_imperatives_affirmative_and_negative_form.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_off0000958a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x958A 5396 bytes
SHA-256: db4e063af58c7a9e2af9de2bea3fad112bf91602944f7255ec9e1a29f2ed3b13
font_01_sfnt_off0000a7b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7B5 10912 bytes
SHA-256: aae9affedd20c628ac986198a9ff3fc396326bcdc0d00c68e7a146ea975bdea4

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