Malicious PDF — malware analysis report

Static analysis result for SHA-256 53f03be3b6983c61…

MALICIOUS

PDF

34.8 KB Created: 2020-08-12 22:41:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6499454d8caccb1ea8946efc9cc401e6 SHA-1: e7f5f6d8296805308f2a577188e855c3095194b1 SHA-256: 53f03be3b6983c61e4f3ebeb870a8f6e85f118e62522ddc563999fa4e954af0e
194 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, disguised as a worksheet answer key. The document body, though partially corrupted, also contains this URL and numerous other links, many pointing to Shopify domains, suggesting a link farm or redirection strategy. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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/wb?keyword=9-2%20skills%20practice%20adding%20and%20subtracting%20rational%20expressions%20worksheet%20answers In PDF document text
    • http://files.thewanderers.org.au/uploads/1/3/0/7/130739758/22797f3e59.pdfIn PDF document text
    • http://files.bscleathers.com/uploads/1/3/0/7/130776433/zidoguzozoj_lixovi_rinotudidojite_wavuliwedewise.pdfIn PDF document text
    • http://files.ruralflaneuse.com/uploads/1/3/1/3/131381675/3014468d82f.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/1/0435/8258/7037/files/fairyland_3_activity_book_vk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/49541392853.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9770/2046/files/91931294034.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7439/6058/files/2062207060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0733/6863/files/98226405883.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/pidalibotosavifugefisalig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6284/4837/files/blank_bullets_gungeon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4336/4759/files/21384214140.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4329/9234/files/15211772757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7591/1321/files/60871521107.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7899/9446/files/tazovuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5382/5704/files/sudodawikomoxeronin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0607/3759/files/fomawolakerakamumiwiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6307/3181/files/goluwewuburobidukoluruzen.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_off00004917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4917 5924 bytes
SHA-256: 861a0d193a8d0e4b234f2c11577244942c7145da45500426ba91704053ad87fa
font_01_sfnt_off00005d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D41 9404 bytes
SHA-256: ac8901641fc863ae83b4273f6fd6e32d93e1f69cd1fcf3d5f160f86cd34db18f

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