Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a5814686d17cff3…

MALICIOUS

PDF

44.7 KB Created: 2020-08-22 08:17:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c9641fb59bdea96d130107814ea8126b SHA-1: 36ce282e469fbc633483914e9285b2458aebab21 SHA-256: 2a5814686d17cff3fd731ecd0852979732c1b5b3c8b3c8696b9bcce3a8c97c54
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=convert+fractions+to+decimals+and+percents+worksheet'. The document body, though partially corrupted, contains text related to educational worksheets, suggesting a lure to trick users into clicking the malicious links. No scripts were extracted from this sample.

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.ru/pify?keyword=convert+fractions+to+decimals+and+percents+worksheet In PDF document text
    • http://files.canterburynuts.com/uploads/1/3/0/7/130739678/bavulokiwoj.pdfIn PDF document text
    • http://nuzodape.jjohnsonartist.com/uploads/1/3/1/6/131606295/cd7dd.pdfIn PDF document text
    • http://files.simplelivingkc.com/uploads/1/3/0/8/130874520/e439217b.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/1/0432/5307/2022/files/pujojivap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8694/6206/files/report_illegal_dumping_dublin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0789/3919/files/stay_strong_demi_lovato.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2447/4531/files/javascript_blob_base64.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2475/0491/files/jekene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9334/4924/files/alphabet_pronunciation_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/7146/5630/files/barmeno_bold_free_font.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 8

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_off000061c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C0 5420 bytes
SHA-256: cef72901c7d32a3fde287dd4f59a7cb87ac1607048e36fe0b34ae54677669e1c
font_01_sfnt_off00007415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7415 10400 bytes
SHA-256: 4578b8a2b18f0435310573ac731e774b1dbd0b4cd10db3019745a09551089a7f
font_02_sfnt_off000097b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97B1 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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