Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1822a628f116828…

MALICIOUS

PDF

38.3 KB Created: 2020-08-20 09:40:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 165097a764819f6b560c7bf61d340df0 SHA-1: 24c4d61d3013213499289930e5abab706d794ee2 SHA-256: f1822a628f11682870cf78cc03a4d550103e9f65598248d40136438619d0790e
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm used for SEO poisoning to attract victims. 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=onerepublic+counting+stars+song++320kbps In PDF document text
    • http://files.crotonlibrary.org/uploads/1/3/1/3/131383480/sedidakavurabafi.pdfIn PDF document text
    • http://xizobi.glacialpark.org/uploads/1/3/1/4/131453358/pizutobun_pujurox_motofubiv.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/1/0434/7261/7637/files/47277389698.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0795/0495/files/49464382054.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/59238094365.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/saxirufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5362/2182/files/halimbawa_ng_barayti_ng_wika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/berlin_u_bahn_map_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5152/1947/files/29914616403.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/wii_controller_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2270/5063/files/54741077124.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3204/2920/files/67813540571.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9234/4999/files/77825935576.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: crotonlibrary.org 3 samples

Related samples 2

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_off00005650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5650 5772 bytes
SHA-256: 125c26c7f729ba3e72756329d7843e0b606014ce859e1b80f3c0c95e0c1543e8
font_01_sfnt_off000069f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69F9 10184 bytes
SHA-256: 6a428568f05da2b7cb5be4f24134b9eed06ad05303d14b1bee4bf2446fb9b91f

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