Malicious PDF — malware analysis report

Static analysis result for SHA-256 23290cbc6a327760…

MALICIOUS

PDF

44.5 KB Created: 2020-08-21 08:58:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d83965b5ec84889f071fe8af4b2b4e95 SHA-1: fcf4660846f88444c98648813fa5568484dc2c2e SHA-256: 23290cbc6a3277606cf4a6cd72b3d3263aad626b6169611bdaaa31050eb4528b
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with a heuristic identifying it as a PDF link farm. One of the primary URLs, 'https://ttraff.ru/pify?keyword=definition+pronunciation+guide', is flagged as a known malicious redirector. While many other links point to benign Shopify domains, the presence of the malicious redirector and the sheer volume of links suggest a malicious intent, likely for SEO manipulation or to funnel users to harmful sites. No scripts were extracted, limiting the analysis of direct payload execution.

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=definition+pronunciation+guide In PDF document text
    • http://files.trudyaustin.com/uploads/1/3/0/7/130774965/b689089ea.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/1/0430/3591/8489/files/decode_base64_to_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6680/9765/files/life_after_death_mary_t_browne_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4717/4812/files/toxawekorovumegujewomoda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1674/1286/files/fototurerekutak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8548/8543/files/soft_drinks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2010/7428/files/wanakugadisowanepebix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6763/7922/files/zalaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3826/0899/files/english_phonetic_symbols_in_khmer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53940391871.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3010/1668/files/39244431535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/wififufofureladov.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 1

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_off000070a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70A2 5112 bytes
SHA-256: 14f3d120f2b9ebfee39cee242167d9a170a25c2f669079c8c65b0965d35ef444
font_01_sfnt_off00008219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8219 10348 bytes
SHA-256: 638ed48a9edd1d06160263245aa9e32b854710cf56aa086527519c9f81c772ec

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