Malicious PDF — malware analysis report

Static analysis result for SHA-256 1235edb85e871477…

MALICIOUS

PDF

45.5 KB Created: 2020-08-23 07:24:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4dd02685d588646a98f8aca0fe2a748e SHA-1: d55abd1d5029b6ec617ae446f02048d6ff54e99b SHA-256: 1235edb85e8714776fae1b1e4bb969660019a86ebd0dc78acbadd9bb8519bfad
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a redirector URL pointing to a lure for a fake caller ID application. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's designed to host numerous links, likely for SEO manipulation or phishing. No scripts were extracted, but the presence of embedded URLs and the redirector indicates a malicious intent to drive traffic to potentially harmful content.

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.cc/pify?keyword=fake+caller+id+mod+apk+latest+version In PDF document text
    • http://files.grimballcotterill.com/uploads/1/3/1/8/131858045/varisevinopufofot.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/1/0439/3825/0910/files/ecology_and_applications_of_benthic_foraminifera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1967/2472/files/wobajabokebuzibife.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7166/7360/files/wupumilewuxaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1404/5341/files/panoxirebebebojem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/2074/2819/files/advocare_24_day_challenge_cleanse_phase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6285/2773/files/jepowusobajudepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8538/9221/files/tibuveza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1796/8536/files/can_t_stop_the_feeling_piano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0635/9713/files/84432144502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2966/6724/files/81747973022.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6728/4387/files/zuvukilimefotiruferakagu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9601/5002/files/34570662032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2218/6656/files/basic_spoken_english_in_tamil.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4A 5300 bytes
SHA-256: cd9e3faf8ba836d0a7c45cdf977c260a378bee84029584be6f506303d8ffd350
font_01_sfnt_off0000703f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x703F 10420 bytes
SHA-256: 72f542c7f05ce896a296201577202eb4553c2e3edf02a2b0ec925f15e9ac0a7c
font_02_sfnt_off00009417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9417 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2

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