Malicious PDF — malware analysis report

Static analysis result for SHA-256 2688dc17d38b460c…

MALICIOUS

PDF

50.3 KB Created: 2020-08-10 06:03:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b2171e422c7869d612969dd8f8a8f4b4 SHA-1: 9e220003c805fdfcb72e233effac9df48101c532 SHA-256: 2688dc17d38b460cdb0c45aeb606a54e476becb7387a7ee9f88818494ea684a9
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, suggesting an attempt at SEO manipulation or a link farm. One critical heuristic identified a link to a known malicious redirector at `https://ttraff.cc/pify?keyword=calvin+cycle+steps+pdf`. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of numerous links and the redirector strongly suggests a malicious intent to redirect users to harmful 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/pify?keyword=calvin+cycle+steps+pdf In PDF document text
    • http://lumanu.mjmoore-moose.com/uploads/1/3/0/7/130776407/9920262.pdfIn PDF document text
    • http://files.ourlittlebarnyard.com/uploads/1/3/2/8/132815207/sebadotopixikak-dewelukifula-rogufewovubulo-kosurifite.pdfIn PDF document text
    • http://files.alpsed.org/uploads/1/3/0/7/130776003/dagivigof.pdfIn PDF document text
    • http://files.paleoplaycanmore.com/uploads/1/3/1/0/131070450/vodex.pdfIn PDF document text
    • http://files.yfeproductions.org/uploads/1/3/0/8/130815277/powelediw_xifikirewuvaro.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/1/0439/2583/1835/files/wings_of_fire_in_bengali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1916/5086/files/xajovotibumiwisog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9801/3845/files/43932219381.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0427/1524/files/sogurawameromuzorurujobuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/votaxozurugaravowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5944/3862/files/zenimil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4769/0145/files/cours_automatisme_grafcet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0167/5939/files/46023265418.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2696/3865/files/75592192193.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3274/7927/files/kufowiga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6594/7798/files/pikorewudalevepibaxulu.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 5

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_off0000873c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x873C 5120 bytes
SHA-256: fe23ef52106784adce17bc96a93ece9af3bd12ae21e3a97a03f67688a69652ec
font_01_sfnt_off000098cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98CF 10528 bytes
SHA-256: 762f0831f271ef7bb825b79ec4d9e17a4cf7bcf1876c75910c6da0e4386e4d92

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