Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c441bc7f0204643…

MALICIOUS

PDF

44.4 KB Created: 2020-08-14 02:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ff0ef41b5b6d540b3f494471abca3131 SHA-1: 9186397132d1a85136530dbf5662acdf495a81d4 SHA-256: 1c441bc7f02046435edea0053fbc56c000f7ce7e918fe571cd6f8a733a435c71
194 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic fired, revealing a large number of embedded links, with the primary one being a redirector. The document body, though heavily obfuscated, contains the suspicious URL and a link to a Shopify-hosted PDF, suggesting a lure to a malicious site.

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=broadsheet+port+melbourne+breakfast In PDF document text
    • http://files.discoveration.org/uploads/1/3/2/7/132710780/9bdde4.pdfIn PDF document text
    • http://files.connieoconnorart.com/uploads/1/3/0/7/130775403/dabitezamapu.pdfIn PDF document text
    • http://files.destination-pickleball.com/uploads/1/3/0/7/130776575/rebepirosinija.pdfIn PDF document text
    • http://files.bridgetghunt.com/uploads/1/3/0/7/130775747/7107167.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/1/0436/5585/6281/files/pumotovubufuridanige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1458/6521/files/amazon_cloud_reader.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5848/7715/files/catalogue_oriflame_11_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0008/5160/files/dokarabipedipaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3847/4397/files/motadovilevifirojek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7055/3250/files/70652948692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8501/2900/files/71280145612.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5618/4992/files/diludenavopole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/baseline_survey_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8991/0165/files/zudujafujulasilutisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6371/9574/files/form_m_1pr.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3422/9398/files/70123971780.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/zoputikagofajawetofekom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7097/9237/files/61635072105.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 4

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_off00006d59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D59 5532 bytes
SHA-256: c1fa83e6a9db5cc5550fb5ffaa84d1999a60a284478d1659a8bc8f07c755380d
font_01_sfnt_off00008005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8005 10644 bytes
SHA-256: ee01332339fdfdd0f104d8caf04f08cee4ca25feaf6c4ff2b358881265768a5e

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