Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d7f78120b23e84…

MALICIOUS

PDF

42.3 KB Created: 2020-08-08 00:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 422db8b84ae83ef33645cceaf35c99fb SHA-1: ae49542251b57979c3b003d6ced211b767f7a7a1 SHA-256: c5d7f78120b23e84b966175b1ed3d74c1eb562e999dba62367aa4eadb5771bdd
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of the primary links, 'https://ttraff.ru/pify?keyword=monosacaridos+mas+importantes+pdf', is identified as a malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious infrastructure. The document body itself contains garbled text along with the malicious URL and several benign-looking Shopify URLs, further supporting the lure-based attack pattern.

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=monosacaridos+mas+importantes+pdf In PDF document text
    • http://files.leaplearnlive.com/uploads/1/3/1/3/131384113/nojuwa.pdfIn PDF document text
    • http://files.neurostartupchallenge.org/uploads/1/3/1/8/131872017/vuzotipavikosalixeli.pdfIn PDF document text
    • http://files.adventurehorizons.com/uploads/1/3/2/3/132303353/5496987.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/1/0432/1135/8372/files/49035321884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/zavasufonebajavodulowat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8632/2600/files/24663175667.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zosogorimojafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8030/3263/files/sejovuwapajomadamadevunof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0079/9140/files/bravais_lattice_types.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6885/8272/files/zokisuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6807/0815/files/degofanipamojipabesumiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5420/2013/files/point_biserial_correlation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/jebifixamanumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4715/6903/files/statistical_process_control_charts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9028/9574/files/raboxukurefe.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_off0000644b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x644B 5276 bytes
SHA-256: 3f4831f66df8a5d845c57e16a5972c4c734b42573789ea18d0732052e5e40efe
font_01_sfnt_off00007631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7631 11312 bytes
SHA-256: 2df76537d5683936a2324098066ddbc31298d3a6ac3b8a33fb2877ef181a7ce6

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