Malicious PDF — malware analysis report

Static analysis result for SHA-256 90eaecd80de8deb2…

MALICIOUS

PDF

55.5 KB Created: 2020-08-28 12:02:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a8d51d6a7378b4db2dd7b1165f465231 SHA-1: 49f96be98672248ef00d7256da968c060695fe92 SHA-256: 90eaecd80de8deb2fe82dd384cfd7754caf0b2e9c19a227aa26e612c9bba2ac3
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector (ttraff.cc). The document body, though heavily obfuscated, contains text suggesting it is an exam for primary school students, likely a lure to encourage clicking the malicious link. The presence of a malicious redirector and a large number of external links indicates a phishing or scam attempt.

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=examen+de+6+grado+de+primaria In PDF document text
    • http://bugijoj.edtechmmg.com/uploads/1/3/0/8/130814011/jutejasumazukolid.pdfIn PDF document text
    • http://nuxuki.jhstoys.com/uploads/1/3/0/9/130969723/pubaso.pdfIn PDF document text
    • http://files.katyjunkremoval.com/uploads/1/3/0/7/130740625/2798966.pdfIn PDF document text
    • http://files.westmontrotaryclub.org/uploads/1/3/2/7/132740291/98806dbeb6d.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/1/0429/4243/1395/files/86658060923.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5312/9640/files/wavaguz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5570/9341/files/toligubuzogojime.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5081/8969/files/75800562911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6643/3429/files/bowuwewivalefivoliveg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9436/7649/files/8524278625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4492/8674/files/59056032776.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4089/7181/files/d_d_3._5_character_sheet_editable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6504/8214/files/google_pacman_2_player.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/4068/6489/files/44409286655.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8991/1194/files/preeclampsia_guidelines_acog.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_off000096f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96F8 5248 bytes
SHA-256: 187dabd06f3fb5063a045e17faeabfa644ec5d249ce5f6763bbe24b023ff3e97
font_01_sfnt_off0000a8bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8BF 11948 bytes
SHA-256: 3d6e83958a740b5b1280f9401dfb4b0c294fefa039a6eed7d144408d67915d2b

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