Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbbb4820cbbec097…

MALICIOUS

PDF

43.8 KB Created: 2020-08-09 02:29:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0ea8de84a1fc9cd5b43cf5f469f716b7 SHA-1: 638294d056225104da4d220440dcb1083c8d39e2 SHA-256: cbbb4820cbbec097e5010efbe428ee71878578545d07efb227c35b4c4af3cb63
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=arbeitszeitgesetz+pausen+pdf'. The document body, though heavily obfuscated, appears to contain this URL and other benign-looking Shopify URLs, suggesting a lure to a malicious site disguised as a document. 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=arbeitszeitgesetz+pausen+pdf In PDF document text
    • http://files.mycorporateteambuilding.com/uploads/1/3/0/9/130969012/bibukekuruvatox.pdfIn PDF document text
    • http://fawovosi.ourwildthings.co.uk/uploads/1/3/0/7/130776485/masesevasupunus.pdfIn PDF document text
    • http://vopujaj.nexstep-pps.com/uploads/1/3/0/7/130775934/7c853cc85e.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/1/0436/3295/1446/files/85648023717.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5768/4375/files/varuxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6805/4949/files/king_worm_adventure_time.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8716/7649/files/ruzazonuzadaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0659/0119/files/el_pollo_loco_menu_nutrition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4535/4658/files/6597498126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8561/0654/files/dinodozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6980/9575/files/18363628517.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/sobokolemofafoxeriloki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0654/8377/files/ds2_twinkling_titanite.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
🗂 Part of campaign: ourwildthings.co.uk 3 samples

Related samples 4

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_off00006c39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C39 5356 bytes
SHA-256: 6c33ccea28df615d9b0906669d2f11d4e72322eaa97973c41fc8eca264466a4b
font_01_sfnt_off00007e82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E82 11084 bytes
SHA-256: 2375d3adedb2fa75416354c4b97e3a185891abd215a61f7a2a897ba7f13f9001

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