Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff8fb6ce7aecafda…

MALICIOUS

PDF

49.9 KB Created: 2020-08-07 05:13:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8a0f5c6d75be44f06d59e73c4af5736e SHA-1: 41fabc692e83a9b26009b42135979d0fdd606e45 SHA-256: ff8fb6ce7aecafda90f5c63eaad9cc1cbfa8cc9b6bddea4d3b5fb9ad6c21680c
194 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains text related to 'acls test questions and answers pdf 2020' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous external PDF links, many hosted on shopify.com, indicates a link farm strategy to improve SEO and potentially distribute malicious files.

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=acls+test+questions+and+answers+pdf+2020 In PDF document text
    • http://files.darpaulrevere.org/uploads/1/3/0/7/130740213/9589335.pdfIn PDF document text
    • http://files.eastmallinginstitutehall.co.uk/uploads/1/3/1/4/131453248/6384483.pdfIn PDF document text
    • http://files.jjjohnsonauthor.com/uploads/1/3/1/4/131437268/lotoxaboxubuw.pdfIn PDF document text
    • http://files.justbeyou.earth/uploads/1/3/1/8/131856034/sifawudepaxoxifo.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/1/0433/0687/7080/files/44329390643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8004/6997/files/tasegiguzakode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4162/0119/files/perixutojav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9540/0356/files/vikuvag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6413/9674/files/jekewipobej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0510/0707/files/fagaluku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1991/0813/files/eichmann_em_jerusalm_livro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/setixinojed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5471/8358/files/begilegomox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5435/7910/files/15929561105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7237/3414/files/lazemiravizarokeramemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5327/7603/files/the_almanac_of_american_politics_2020.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_off0000834b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x834B 5632 bytes
SHA-256: 60864d675a729cd4e335cf89e90cd9b1b312b55826346eb7ae423d5c850ec836
font_01_sfnt_off00009699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9699 10536 bytes
SHA-256: b04a20510d48e96982382eeec2f15a97413c0342873c5ddc9a9d52d7d163cc2d

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