Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5f20e567fffe951…

MALICIOUS

PDF

38.1 KB Created: 2020-08-26 08:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 497e492016b926e797f23aff3aa74879 SHA-1: 5c1b45124c70085f5c3a320161e584a57accfa66 SHA-256: f5f20e567fffe951959a99d53673d06aaa0086db7fa98fccfbaca7feb7a4788e
194 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous embedded URLs, including a primary redirector at 'https://ttraff.ru/pify?keyword=american+sign+language+dictionary+third+edition+pdf'. This indicates a social engineering attempt to lure users to malicious infrastructure. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. No scripts were extracted, limiting the analysis of further stages.

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=american+sign+language+dictionary+third+edition+pdf In PDF document text
    • http://nevalotef.wellness.org.sg/uploads/1/3/1/3/131384260/4591653.pdfIn PDF document text
    • http://wufejexu.konsultservices.com/uploads/1/3/1/3/131380005/pugiwemarukaginupev.pdfIn PDF document text
    • http://files.mammysplace.ca/uploads/1/3/1/3/131383318/jilumedirekof_xifoz_nanujusus.pdfIn PDF document text
    • http://files.mcswa-wv.com/uploads/1/3/1/3/131398406/8289148.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/1/0430/5331/8306/files/kutimepivuluwevejolodi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2748/8168/files/bedutazuwame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3400/8987/files/catecismo_de_la_iglesia_catolica_vaticano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9798/1082/files/xofixezetukig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2358/0835/files/14302816524.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1049/7434/files/49200804640.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6291/0376/files/beginners_guide_to_chakra_meditation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51851907441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/3796431094.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2631/7473/files/pubosifozi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2630/8510/files/getebepijerowa.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
🗂 Part of campaign: org.sg 5 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4835 5540 bytes
SHA-256: 5ba992db2f126a188bae986280b988e608c125784827f3bd0d29302eb7aa1b55
font_01_sfnt_off00005ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD6 9964 bytes
SHA-256: 05fd1d54e43273f74bb593c90d3c5a287613b7b423f958d8d259f5454946cf6f
font_02_sfnt_off00007cec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CEC 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2