Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdbdac5039d8a8be…

MALICIOUS

PDF

35.9 KB Created: 2020-08-25 11:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b67aed0bce0ef1d2d595557765124fa4 SHA-1: 2a8736e9137edd7106927c3ad1ed8d5b3b9a1448 SHA-256: fdbdac5039d8a8be14fe0f5f00bfb4b1a7407076e38b85a437e092f2c1165aaa
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, masquerading as search results for educational materials, with the primary link directing to a known malicious redirector. The document body, though heavily corrupted, contains fragments that suggest a lure related to 'glencoe mcgraw hill math course 3 answers'. The PDF structure and embedded links indicate a phishing or redirection attempt to malicious infrastructure.

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.ru/pify?keyword=glencoe+mcgraw+hill+math+course+3+answers In PDF document text
    • http://files.cbible.org/uploads/1/3/1/3/131383942/mufozevojokem_sitilanako_fekawiz_burepa.pdfIn PDF document text
    • http://files.crossfirerec.com/uploads/1/3/1/8/131871871/xogakevo-juvurevokunire.pdfIn PDF document text
    • http://kuxiro.miweddingpainter.com/uploads/1/3/2/8/132815806/7847985.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/1/0434/9542/4165/files/jafovurisowe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/67163406229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/nuwave_oven_recipe_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/6996/9308/files/tiregukigojuvepafa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/duwaxufezemurogagur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7723/7917/files/muvusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8300/5093/files/kupofinipul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/3024/3484/files/92932707237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2728/9496/files/gutakorevopan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6217/3602/files/pumubisalupawilaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8121/1810/files/practical_music_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2033/7831/files/reasoning_ability_tips_and_tricks.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 8

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_off00004ed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4ED7 5500 bytes
SHA-256: 60501ed3e5c2da49c5b34d99c1b739d076da66d29d676354405ff8b7e94bbd21
font_01_sfnt_off00006175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6175 9704 bytes
SHA-256: 718fc454b5ceaaecb693db0afe5f4241ba8a49c783df65d910919df64fe9dc15

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