Malicious PDF — malware analysis report

Static analysis result for SHA-256 9475f589fb8726d9…

MALICIOUS

PDF

33.0 KB Created: 2020-08-17 04:26:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24e01d3bce233efcddece57143425565 SHA-1: 2903dd9464f0f5d9e823eaf1985e1da7a95b2b97 SHA-256: 9475f589fb8726d9eb692baa419850b88e5fd1bb39b23654d2eae6a2924a4cba
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, traff.com, which is used to obscure the final destination. The document body, though partially corrupted, contains text related to a 'Hawaiian tel tv guide', suggesting a lure to trick users into clicking the malicious link. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm designed to attract traffic. No scripts were extracted, but the primary malicious activity appears to be redirecting users to potentially harmful content.

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=hawaiian+tel+tv+guide
    • http://nekesigog.monacannation.com/uploads/1/3/0/9/130969858/nesupokote_xinobax_kisovawi.pdf
    • http://files.sb-eyes.com/uploads/1/3/1/4/131453247/2419193.pdf
    • http://files.slayingwithdice.com/uploads/1/3/1/8/131856877/vupanabi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3762/0386/files/38032041844.pdf
    • https://cdn.shopify.com/s/files/1/0430/6550/8002/files/37563267595.pdf
    • https://cdn.shopify.com/s/files/1/0437/3259/8938/files/tratados_internacionales_de_mexico_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/4131/6264/files/wisanuguf.pdf
    • https://cdn.shopify.com/s/files/1/0439/2222/7368/files/tabela_periodica_toda_materia.pdf
    • https://cdn.shopify.com/s/files/1/0427/5830/8006/files/nodolizuvevizojajezirono.pdf
    • https://cdn.shopify.com/s/files/1/0431/8468/5224/files/31466810715.pdf
    • https://cdn.shopify.com/s/files/1/0431/9150/0961/files/joreg.pdf
    • https://cdn.shopify.com/s/files/1/0435/8511/0171/files/41521512559.pdf
    • https://cdn.shopify.com/s/files/1/0437/4682/0245/files/40280904728.pdf
    • https://cdn.shopify.com/s/files/1/0427/3229/0215/files/39701529491.pdf
    • https://cdn.shopify.com/s/files/1/0433/6926/7354/files/tufexiwekexutab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9688/3868/files/rotate_labels_ggplot2.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004418.bin
ad54549a8c18530cab4647dce723b58c442fec39b11b13fee5e96b31e1cff6a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4418 4832 bytes
font_01_sfnt_off000054ae.bin
529531663a43c2c91da826a5487d1c7915cf9c9581a6bc56a9bc82e6c51de380		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54AE 10076 bytes

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