Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bdb8d44469cba35…

MALICIOUS

PDF

40.2 KB Created: 2020-08-19 10:16:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: edd45eb2e1f73de7ff622d3b529dc5a5 SHA-1: 9308584f5ccf2e71aceaad3fdb1535556af64517 SHA-256: 1bdb8d44469cba35ad4c8427a73080c04503085ff5a26c7d0e2cb2e7f8c3f9d6
194 Risk Score

Malware Insights

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

The PDF file was flagged as malicious due to a high number of embedded links pointing to a redirector and a link farm. The document body contains text that appears to be related to a '4 pics 1 word' game, likely a lure to entice users to click the malicious links. The primary malicious URL identified is https://ttraff.cc/pify?keyword=248+answer+4pic+1+word, which is a known malicious redirector.

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=248+answer+4pic+1+word In PDF document text
    • http://kewamip.amystreasuresdesign.com/uploads/1/3/0/7/130739098/munopizo.pdfIn PDF document text
    • http://defoxa.customstitchnmend.com/uploads/1/3/1/8/131856124/1900bc8.pdfIn PDF document text
    • http://files.babydollsheepaustralia.com/uploads/1/3/0/8/130873822/207599.pdfIn PDF document text
    • http://files.prettybakedqueens.com/uploads/1/3/1/3/131379832/6399225.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/81556497347.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7663/2214/files/78120264845.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/5106/9085/files/94049212802.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6126/5062/files/xufumasikanezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7142/2102/files/gufexenat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5697/1432/files/12116198334.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2576/7320/files/teacher_aptitude_test_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9200/1433/files/average_value_of_sine_wave.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52A7 5204 bytes
SHA-256: 2acb237928879a05c3f8475baf7cbbef9f8c683efef3f3e7fb3625c6fd706a5c
font_01_sfnt_off0000645e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x645E 10016 bytes
SHA-256: a6642b096757e28d3a571cca0a498ef9e488ffe06797c3979e80c42146e6f88a
font_02_sfnt_off00008625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8625 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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