Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecce2fe34528443d…

MALICIOUS

PDF

34.4 KB Created: 2020-08-21 10:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 21537daf3de6a7a2b71ee45691bdb953 SHA-1: 2f646bb62d42aeb10f4ceed16916f6324cf5eaa1 SHA-256: ecce2fe34528443d7d7878df4ce99d704afc7176f029f589b50108a04c488ff9
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=direct+and+indirect+objects+spanish+worksheet'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL and several benign-looking PDF links, suggesting a lure to disguise the malicious redirect.

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=direct+and+indirect+objects+spanish+worksheet In PDF document text
    • http://files.tigerindustriesinc.com/uploads/1/3/1/3/131379991/5910297.pdfIn PDF document text
    • http://mofix.writingandrhetoricmke.com/uploads/1/3/1/3/131398140/e78ffc387.pdfIn PDF document text
    • http://files.travelwithbayside.com/uploads/1/3/1/3/131397946/e641141b7.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/1/0450/2755/7526/files/modelo_pedagogico_definicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/70792192710.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/sovukuvufenefetifekokezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1800/9250/files/12363594472.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/quran_karim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/47412494633.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8776/4387/files/buku_agama_islam_kelas_10_smk_kurikulum_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0239/5813/files/arabisch_lernen_a1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6878/3766/files/32289766117.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2295/8248/files/lexixeledovunamufekep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9481/7445/files/78543623641.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 2

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_off0000470f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x470F 5500 bytes
SHA-256: 6f6da200fa3da9915c693c9403544a9fcd5297ae46749085315431cf4d1a812f
font_01_sfnt_off000059c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59C5 9560 bytes
SHA-256: 160e77d99c2ddbba45f64be93bc43b30102ed190eeb35ed29c07905f5241f67c

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