Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a193661d7ecba5b…

MALICIOUS

PDF

45.3 KB Created: 2020-08-06 17:37:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68fb3b21b7368e74f3d66fab402aab94 SHA-1: 6be994cb71713eb286fdee86abbfca9ed2cb253f SHA-256: 7a193661d7ecba5b95199c7f8a784295c719f02ae7e55750fe6b1bddd31ca779
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to external PDF files, suggesting a link farm or SEO manipulation tactic. One prominent link directs to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though partially corrupted, contains text related to 'value proposition canvas' and the malicious URL, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=value+proposition+canvas+pdf+book
    • http://files.perfectbalancenutrition.org/uploads/1/3/2/6/132682745/fifus.pdf
    • http://senepisat.canadas911ride.com/uploads/1/3/1/4/131453674/viwaxapuvov.pdf
    • http://dagivizod.bostondigitalproductions.com/uploads/1/3/1/3/131383544/jakegazevajawerafogo.pdf
    • http://files.insitju.com/uploads/1/3/1/0/131069904/37120711f58.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/xozinetedanolegosu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6990/6854/files/foviwigejumubiviza.pdf
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/7230503411.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1013/files/wutenitifiwu.pdf
    • https://cdn.shopify.com/s/files/1/0439/0325/4696/files/fazosiwevi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8845/3533/files/22149697989.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56751463133.pdf
    • https://cdn.shopify.com/s/files/1/0435/9038/5823/files/22556641225.pdf
    • https://cdn.shopify.com/s/files/1/0434/0600/0282/files/nitro_reader_64.pdf
    • https://cdn.shopify.com/s/files/1/0449/3859/2424/files/malayala_manorama_calendar_may_2020.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073ec.bin
3a8a166b0290e75f87bb4b8a6ec28f85f2e3990431497ec80cd5ea6976aad055
pdf-font-stream PDF embedded font (sfnt) at offset 0x73EC 5376 bytes
font_01_sfnt_off0000864d.bin
c3af7e625f1e943ffe9b2255ea329223a893d4f0eab77ec264fe528f20d00384
pdf-font-stream PDF embedded font (sfnt) at offset 0x864D 10160 bytes