Malicious PDF — malware analysis report

Static analysis result for SHA-256 065d0194fd6355ce…

MALICIOUS

PDF

36.9 KB Created: 2020-08-04 02:55:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d54755ba9672cd441b22717b1f034c55 SHA-1: 8f9846084907e0215b60184a33db70b39f208025 SHA-256: 065d0194fd6355ced4d35616024a1c0dfe734c02e989f41271bc2900cc12654b
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, suggesting a phishing or malware distribution attempt. The document body and embedded links mimic a free book download, a common lure for users. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL supports this assessment.

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=wastewater+engineering+treatment+and+reuse+4th+edition+pdf+free+download
    • http://files.michellehepburn.org/uploads/1/3/0/7/130776060/424560.pdf
    • http://files.rtwtus.org/uploads/1/3/1/6/131606128/636745.pdf
    • http://files.wagonwheelacres.com/uploads/1/3/1/3/131380236/1967631.pdf
    • http://files.thejourneyisourdestination.com/uploads/1/3/1/3/131383673/8aa48067ec1.pdf
    • http://files.1afan.com/uploads/1/3/1/4/131437834/98f285717de.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6116/5723/files/88597819050.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mosagewenusuwaguxizekud.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/66269065968.pdf
    • https://cdn.shopify.com/s/files/1/0433/7513/2821/files/mexorid.pdf
    • https://cdn.shopify.com/s/files/1/0435/9100/8418/files/twitch._tv_meclipse.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/fuluvemugiferisiloroxili.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/bokidutomi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/89332506526.pdf
    • https://cdn.shopify.com/s/files/1/0429/1277/6351/files/vobizajixibovewuxebanokux.pdf
    • https://cdn.shopify.com/s/files/1/0431/6971/0242/files/kuboroxatefibimuva.pdf
    • https://cdn.shopify.com/s/files/1/0429/4869/0076/files/75885366583.pdf
    • https://cdn.shopify.com/s/files/1/0432/1745/3211/files/18269795382.pdf
    • https://cdn.shopify.com/s/files/1/0434/4555/1256/files/dowopebukuradofeto.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_off000050e3.bin
e33b0587681d75d1345a33aa24e86c146c8c17df731bdbd4d1bb72e129b7667a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50E3 5648 bytes
font_01_sfnt_off00006410.bin
05f270e2dc39c3d258044985de1c3961fe2bbde07aedf60739fb8fad78f1f6d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6410 9872 bytes

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