Malicious PDF — malware analysis report

Static analysis result for SHA-256 57a1b169b88db87b…

MALICIOUS

PDF

40.7 KB Created: 2020-08-21 22:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cb0fffb5642f23f2306c5d994c05d601 SHA-1: d522737401303251732e4f8a3325194e05ec098d SHA-256: 57a1b169b88db87b4b0ea5b399dcc3f4fad52ba584a5a52c7cd07510bc2734ef
194 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector (ttraff.cc). The document body, though heavily obfuscated, contains text related to 'Android studio tutorial pdf 2018' and the malicious URL, suggesting a lure to disguise the malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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=android+studio+tutorial+pdf+2018 In PDF document text
    • http://files.seminlee.com/uploads/1/3/2/6/132681062/b62f0fe7.pdfIn PDF document text
    • http://files.acadia-aquafarms.com/uploads/1/3/0/7/130775062/mijipopokopivi.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/1/0439/3612/0990/files/ziwoweguvesowovire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7257/0012/files/demographic_transition_model_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0900/0103/files/crucial_ssd_clone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12339474235.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2129/5006/files/tinkers_alien_modifier.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6675/2164/files/96493218457.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9276/2006/files/technical_interview_questions_on_java_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3505/7566/files/keguxikazunogamujepini.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/fazedofobovo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6499/7526/files/lolaxevipigi.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_off00006017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6017 5544 bytes
SHA-256: 169b3ca65fbd6a08cadcde78b240dbb5db28c86448c531e14438e8b866f61664
font_01_sfnt_off000072fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72FB 10356 bytes
SHA-256: dba8d3036b7b928cee0699e7978ee2ae0af6a32992fc843b35e86b869a8f4571

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