Malicious PDF — malware analysis report

Static analysis result for SHA-256 cff0574be4194d7a…

MALICIOUS

PDF

39.6 KB Created: 2020-08-19 01:20:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c3f8cda8e7df92846ec58689da054fab SHA-1: 339661d2ae10cc2ff368a4f0cf80916937a28609 SHA-256: cff0574be4194d7ae0b94388a2fa0d9c491d138264065663957024a03259ed45
194 Risk Score

Malware Insights

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

The PDF contains a high number of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.com). This suggests a link farm or SEO poisoning technique to distribute malicious content. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. The ML classifier also strongly indicated maliciousness.

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=number+line+multiplication+worksheet+pdf In PDF document text
    • http://files.thelookbyus.com/uploads/1/3/1/4/131453990/nedunododaso_sawakenole_buxipe_badoxepunidawi.pdfIn PDF document text
    • http://files.streetwearformula.com/uploads/1/3/1/3/131398141/6540420.pdfIn PDF document text
    • http://files.guildscc.org/uploads/1/3/1/0/131070212/9511837.pdfIn PDF document text
    • http://files.covoc.ie/uploads/1/3/0/8/130874416/gowikuzim.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/1/0430/5528/4373/files/combine_video_and_audio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2210/6269/files/guvakobumoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3557/4943/files/42478147795.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15074065918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/becoming_supernatural_joe_dispenza_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6055/1070/files/fudanujixizivumatizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7144/6939/files/36373172881.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 6

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_off00005bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD3 5660 bytes
SHA-256: 827ecb66f62ea4d9e14f42e9a224ed346449c70209578b097d11a148ca085dac
font_01_sfnt_off00006ef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF2 10132 bytes
SHA-256: 0c1cde3f87302f5d9e13f08a44de28ed920b2beca1b683d906ed447402ecd797

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