Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef7e08cd11cf7ac7…

MALICIOUS

PDF

46.9 KB Created: 2020-08-16 10:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 459295198e3b17cc4a77421ea790025b SHA-1: dc5c8e7c30a95d891b519abdcfd51f2c1be9f67c SHA-256: ef7e08cd11cf7ac7a36d100f9875f4f0dab88f5ca389123225a44c7d33d48304
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a lure to install a browser extension or update, a common social-engineering tactic. It also hosts a large number of external PDF links, many pointing to potentially malicious redirectors like https://ttraff.com/pify?keyword=twitter+photo++firefox. The document body itself is heavily obfuscated but contains the same redirector URL. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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.com/pify?keyword=twitter+photo++firefox In PDF document text
    • http://files.mwsphotostories.com/uploads/1/3/1/4/131483254/8c2a38.pdfIn PDF document text
    • http://files.artworksfelicityprazak.com/uploads/1/3/1/6/131637606/mamejexesewo.pdfIn PDF document text
    • http://files.susanbrumfieldmusic.com/uploads/1/3/1/6/131637307/batekutujago_sunaxegasip_jugogilubor.pdfIn PDF document text
    • http://zixawuzeb.historyobscura.com/uploads/1/3/1/8/131857920/9108040.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/1/0437/4836/0343/files/su_kasidesi_erhi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/bebavigazefuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2862/8124/files/mastering_concurrency_in_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7520/5288/files/55864102872.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/bivufujuzomavig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/92194068174.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5366/2887/files/zapukisidumu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/bangkok_city_tourist_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0860/4829/files/xazuvagogikob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5876/4696/files/77992441938.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3706/4348/files/4114695668.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 5

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_off0000720c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x720C 4680 bytes
SHA-256: 00cedc95e5c457f49f7d49d663e1633b740b80c49eaab221c9d7221e271d2bb7
font_01_sfnt_off00008207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8207 13952 bytes
SHA-256: 902db2be6e7b9fd1110eef2a30c75bf975f34a1d18de2c8490390a3b9ba90a2d

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