Malicious PDF — malware analysis report

Static analysis result for SHA-256 032b09ec50722e51…

MALICIOUS

PDF

35.8 KB Created: 2020-08-26 19:14:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c2b66bb64f860543436224ee3289ce9 SHA-1: d933a96153421baa28e7932951fc23e7cb5aa630 SHA-256: 032b09ec50722e51af25b3bd2762eea9455d0eac0099c928adb71b07d3dcacdd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to a known malicious redirector, indicating an attempt to lure users to malicious content. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the redirector URL, suggesting a phishing or scam attempt.

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=factorio+oil+burning+generator
    • http://vodiv.huonvalleyescapes.net/uploads/1/3/1/4/131438405/941987.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6489/3344/files/terajizana.pdf
    • https://cdn.shopify.com/s/files/1/0431/2036/1629/files/45368592334.pdf
    • https://cdn.shopify.com/s/files/1/0439/9045/0334/files/arya_movie_mp4_video_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/5676/6882/files/30127725211.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/63223059783.pdf
    • https://cdn.shopify.com/s/files/1/0433/1244/7652/files/46269713283.pdf
    • https://cdn.shopify.com/s/files/1/0439/7550/8126/files/loverexaveroxipupibu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4432/2978/files/45231579269.pdf
    • https://cdn.shopify.com/s/files/1/0433/9141/8526/files/75250349476.pdf
    • https://cdn.shopify.com/s/files/1/0438/5721/5648/files/1659498670.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_off00004e5e.bin
14df086d8ef88f56db59769ed58936ed3e3cdeebe8e7da721fc47c0175bc45e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E5E 4884 bytes
font_01_sfnt_off00005f05.bin
89e4cbb2d3f81ac508eb138f1641518bbcec2d3b40c5972723868c18def9e39b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F05 10468 bytes

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