Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5ad5048fabacb31…

MALICIOUS

PDF

45.0 KB Created: 2020-08-20 07:58:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e64b872f43dcae9983d5225252c4c87c SHA-1: 3135b8007d2f7a5b91fb28e2fa69271ee0c27b53 SHA-256: f5ad5048fabacb31bb89fae4b8c2e205e2441f71aa3ef73be03a4f79ee65743e
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=multiplication+and+division+printable+worksheets+grade+3', indicating a lure related to educational worksheets. The ML classifier strongly supports the malicious nature of this PDF.

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=multiplication+and+division+printable+worksheets+grade+3 In PDF document text
    • http://files.sabahalmukhtar.com/uploads/1/3/2/7/132740414/xajalemunom_tozanugezu_pebidufekenuzof.pdfIn PDF document text
    • http://files.modestousbc.org/uploads/1/3/1/4/131452741/tekisaxexoxuzafez.pdfIn PDF document text
    • http://regis.seeinggodinlittlemogadishu.com/uploads/1/3/0/8/130814995/3ac424d089f2.pdfIn PDF document text
    • http://files.musicaturing.com/uploads/1/3/0/7/130776754/778d3.pdfIn PDF document text
    • http://gusimoriw.midwesthomebuilding.com/uploads/1/3/1/3/131381497/nizifawo.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/1/0432/1280/0159/files/arithmetic_series_word_problems_worksheet_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28391359898.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/92329675099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2358/7733/files/advantages_and_disadvantages_of_reading_aloud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4220/9945/files/unamused_emoji_text.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2903/5158/files/53663820101.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9587/6003/files/xebidasipikuvubekisubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4618/3847/files/abbyy_transformer_3._0_full_trke.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_off000069ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69EF 5860 bytes
SHA-256: 037c41b522a8772bc7c72c4724f97d4c7d70e6bc6b8210dbfccb45c6c4a97b7d
font_01_sfnt_off00007dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DEE 12096 bytes
SHA-256: 5ebfeb324d7639f5c8cfc13e813031298145e8f4da92cd0a14a8529dfca04da6

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