Malicious PDF — malware analysis report

Static analysis result for SHA-256 707b6e86dad21798…

MALICIOUS

PDF

48.5 KB Created: 2020-08-09 04:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57bf8a2d1e97718af672262c151aeb38 SHA-1: 3f79e7c1fd97b1b20194895694c3da7c53f976d4 SHA-256: 707b6e86dad21798259fac87ea30b72ebd8d801cba366f8de112327a7349bb7b
162 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download button, aiming to trick users into clicking it. The link leads to 'https://ttraff.cc/pify?keyword=pdf+file+unlocker+apk', which is flagged as malicious. The document also hosts a large number of other PDF links, suggesting a link farm for SEO manipulation or further distribution. No scripts were extracted, but the presence of a malicious redirector and the lure of a download button strongly indicate a phishing or malware distribution attempt.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=pdf+file+unlocker+apk
    • http://files.snowypeaksoap.com/uploads/1/3/2/3/132302973/a7512c13cdce8e.pdf
    • http://files.hugohowls.com/uploads/1/3/1/8/131856200/zanuravekefanepox.pdf
    • http://rimibema.amanda-winston.com/uploads/1/3/0/7/130776485/referorupav.pdf
    • http://nanura.olympicclassictbirds.com/uploads/1/3/0/8/130874493/tobutiso.pdf
    • http://www.opentle.org
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48695811849.pdf
    • https://cdn.shopify.com/s/files/1/0431/7226/6150/files/lulijumi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7811/3697/files/18147270688.pdf
    • https://cdn.shopify.com/s/files/1/0429/8607/8369/files/jebunubojo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2436/7266/files/gelenitifig.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34803766861.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2998/files/detajuzosuwukonubetimo.pdf
    • https://cdn.shopify.com/s/files/1/0439/3854/5819/files/vafikifinubiki.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinavupomun.pdf
    • https://cdn.shopify.com/s/files/1/0433/9784/1063/files/curso_de_ingles_iniciante.pdf
    • https://cdn.shopify.com/s/files/1/0434/6331/1513/files/7564104777.pdf
    • https://cdn.shopify.com/s/files/1/0446/9240/6428/files/asymptotes_solved_questions.pdf
    • https://cdn.shopify.com/s/files/1/0431/3301/0074/files/beethoven_appassionata.pdf
    • https://cdn.shopify.com/s/files/1/0431/6309/1112/files/26454142862.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://www.gnu.org/licenses/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00006046.bin
485290859e1ce86e8668c4f9c355bb696d19ab2a03d4818264352ca4985a9c19		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x6046 13112 bytes
font_00_sfnt_off00004fe1.bin
5e8dad3a976be0a59037fc6bd1c4173afe47c16a8c3fa92fc3fbd26490ad9537		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FE1 4840 bytes
font_02_sfnt_off000084cf.bin
558b981951db67ce8e34a5d3d82f7da3df5f118de40974216ac34d1c23f867c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84CF 9820 bytes
font_03_sfnt_off0000a677.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA677 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.