Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b9b090e684651c2…

MALICIOUS

PDF

103.4 KB Created: 2020-08-23 17:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04c08d9c928bb6d472711195ec302523 SHA-1: 065909fc3ce07da7527b121eb6a6857507080abe SHA-256: 6b9b090e684651c280359ec387d74e2002eda7a0dc60040921f7e4573cdc4d9c
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying it as a redirector to malicious infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for users seeking information on 'cyanobacteria identification pdf'. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely to direct users to a phishing or malware distribution site.

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.cc/pify?keyword=cyanobacteria+identification+pdf
    • http://files.woodhousearts.com/uploads/1/3/1/4/131407194/jevuj.pdf
    • http://piwuxefip.uncdf-a2f-kigoma.com/uploads/1/3/0/7/130776225/881982.pdf
    • http://nuzuridu.tangerinetales.com/uploads/1/3/0/9/130969406/7b0ae8089edcdb0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0354/3715/files/daxateba.pdf
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/31912579871.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7381/files/sample_mp4_video_url.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7545/files/rakurijigisev.pdf
    • https://cdn.shopify.com/s/files/1/0430/8772/4704/files/aashto_bridge_design_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/0580/4698/files/ferozulonusavenorene.pdf
    • https://cdn.shopify.com/s/files/1/0432/9386/8187/files/f2p_money_making_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0430/2848/0163/files/gedikijodet.pdf
    • https://cdn.shopify.com/s/files/1/0428/2292/6492/files/13565487927.pdf
    • https://cdn.shopify.com/s/files/1/0431/0558/3266/files/diagnostic_interview_for_personality_disorders.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0899/files/exponential_smoothing_time_series.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3846/files/42972069465.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013ed4.bin
7f4abb972d705aeceb77a7f3598ae1c72a5080045891c4144e55bceee85a6f18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13ED4 5084 bytes
font_01_sfnt_off0001502f.bin
d01b86eab42c124225838f602f07074dbd2f3d75c3f3793e53619f1008e400bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1502F 13152 bytes
font_02_sfnt_off00017b0a.bin
e9f71365a2a9ea4b152c2f6701d7ccf33f67bf216d443f7f7b47b7c3311bc682		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17B0A 16112 bytes

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