Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5185d1c229ff4a6…

MALICIOUS

PDF

44.0 KB Created: 2020-08-20 14:56:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b8c48a0ccde316af6fb98f25c69d80b4 SHA-1: 0fa85998445900e4a6a8b7be44fbf16a452df260 SHA-256: b5185d1c229ff4a6bccaa0d5fb91eaa16e719d5f2750438c1bc07d1e761f4dca
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple embedded links, including one pointing to a known malicious redirector. The heuristic firings indicate this PDF is designed as a link farm, likely for phishing or malware distribution, using a fake invoice lure. The ML classifier strongly supports the malicious nature of this PDF.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.com/pify?keyword=apple+and+android+pay+limits In PDF document text
    • http://files.housefinchinvestors.com/uploads/1/3/2/6/132682787/relufat.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/1/0430/8071/2343/files/luwasolepoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6513/0658/files/cultura_geral_em_angola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8973/1479/files/begumipepir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3493/3408/files/1454189325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3762/9348/files/noreweluxogutukepuzerukaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46287179129.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13908697451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6693/1862/files/pudemomalurakujax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0210/9856/files/13697648023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/84994779253.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9866/1279/files/zadumitopurasuvibimapi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8443/2031/files/dopimimupowevovavor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1388/8405/files/can_t_let_go_novel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2535/7206/files/ampere_s_circuital_law_proof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2550/6208/files/51587064597.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_off00006e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E05 5196 bytes
SHA-256: da61a06369038fda7a552dbdc3510d80dd226aafd0869c4f8ae5442f36f44574
font_01_sfnt_off00007f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F98 10524 bytes
SHA-256: d068b899cd094dd41908052f0d8f95ed03628e8a9d5de1503f37480ffbcc6490

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