Malicious PDF — malware analysis report

Static analysis result for SHA-256 eac8bd22e0800e53…

MALICIOUS

PDF

73.5 KB Created: 2020-08-08 15:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 38e8c39e6102a871e26ff91f5693b00b SHA-1: 426fb89e26792571ded07559adb2177a68024fc1 SHA-256: eac8bd22e0800e53456e1c9b55bdf8c5a2393573f308d80541ec6dec50ab81d8
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'calculus 2 series and sequences pdf'. This suggests the document is designed to trick users into clicking the malicious link, which then redirects them to further malicious content. The presence of numerous other links, many hosted on Shopify, indicates a link farm strategy.

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.com/pify?keyword=calculus+2+series+and+sequences+pdf In PDF document text
    • http://files.seainthemind.com/uploads/1/3/0/7/130776164/abdac47f20cb332.pdfIn PDF document text
    • http://files.agelesswesterncanada.com/uploads/1/3/2/7/132740584/9b4fa9f.pdfIn PDF document text
    • http://files.kinn131.org/uploads/1/3/1/4/131409074/fotalisudunerotan.pdfIn PDF document text
    • http://fatufuz.chenzbob.com/uploads/1/3/1/6/131637257/8c2152952cb089.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/1/0434/7972/8281/files/59544111840.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3765/4178/files/galileo_sidereus_nuncius.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1130/9719/files/78628497864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2308/9307/files/nisisaxitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/fenajebuvabi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2340/8036/files/ielts_writing_exam_samples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0427/1524/files/97573483970.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0577/1939/files/lazabofimalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/wisitepezeredakoru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6240/1947/files/getitilesuma.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC75A 5120 bytes
SHA-256: f17413f41365f98e6855fd9369a3ac9cf6e0d83e20dace998d25e6ffb2710c2a
font_01_sfnt_off0000d8c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C6 15736 bytes
SHA-256: e66d7f3a93e88ace2173f2c58c0b143f248c9828c44ae863096e0bf9ad73f85f
font_02_sfnt_off00010a6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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