Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dcffa6e2021c072…

MALICIOUS

PDF

50.6 KB Created: 2020-08-11 18:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 75d0bbede4db8ab09eaa934b66c019e9 SHA-1: aaa475468c7fe63b4c491eec6afa9cc3272ed119 SHA-256: 9dcffa6e2021c0725e8179255617da8eac83258a3af40c30d229db64996c807c
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=learn+storyboarding+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body is heavily obfuscated but contains the same malicious URL. The primary attack pattern involves luring the user to click on a link that redirects to malicious infrastructure.

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=learn+storyboarding+pdf In PDF document text
    • http://pepobamo.simplywholesometreats.ca/uploads/1/3/0/8/130873958/265309.pdfIn PDF document text
    • http://files.arcancientaromatherapy.com/uploads/1/3/1/3/131398139/jidas.pdfIn PDF document text
    • http://files.lsuhealthsciences.com/uploads/1/3/1/4/131409909/26dadb2eb5.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/1/0432/5031/9528/files/65431072319.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0133/1360/files/luzavupipezepulowab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6795/7660/files/backlash_in_gears.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3243/7158/files/59886332962.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6587/6390/files/sources_of_genetic_variation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1828/8284/files/husqvarna_yta22v46_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7522/1144/files/microsoft_access_manual_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0702/5060/files/basic_arabic_words_to_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9380/2646/files/jopogepupas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6399/1717/files/jugemuzotisoketegibugarug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/lamelagomubezata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4421/6730/files/67971984530.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/51823789401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0403/5221/files/niluxemasavoxuge.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE9 5148 bytes
SHA-256: 48f511f1e8c5f6934592d7aef07c985d58eb00fba79d08dfcd4a42877a319959
font_01_sfnt_off00008c7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C7D 10184 bytes
SHA-256: ddd581dfceac6c0c07bea30b43e96767dc9ae430a28153abd646f047bc13e75f
font_02_sfnt_off0000af58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF58 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3