Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aa5eb38abe462d4…

MALICIOUS

PDF

53.1 KB Created: 2020-08-14 07:56:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73468369bce7307f7b315e34894dbc2c SHA-1: f929028218946c48e50ce807ffc39b53e7edf390 SHA-256: 5aa5eb38abe462d4f689286a463fd5aa294f398bc12c74b30086ddb4acbb83a0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though partially corrupted, contains the same URL, suggesting an attempt to trick users into visiting malicious sites. The presence of numerous Shopify links, some marked as benign and others unknown, along with the redirector link, indicates a link farm or redirection scheme designed to lead 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=android+room+database+multiple+tables
    • http://files.nisanifarm.com/uploads/1/3/1/4/131437859/favexupajewobid.pdf
    • http://turadar.dirainternational.com/uploads/1/3/2/7/132712116/paledifepe.pdf
    • http://files.chinookaircraftsales.com/uploads/1/3/0/7/130775743/254ba8630f243.pdf
    • http://letoxu.jpzproducts.com/uploads/1/3/0/8/130814328/2ba329.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4317/6091/files/sojaxiri.pdf
    • https://cdn.shopify.com/s/files/1/0435/0610/6528/files/35683236871.pdf
    • https://cdn.shopify.com/s/files/1/0429/2496/6044/files/75116186792.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1077/files/36863608169.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/pananan.pdf
    • https://cdn.shopify.com/s/files/1/0435/8553/6161/files/tuguvanekosikozivugalune.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2040/files/5980089460.pdf
    • https://cdn.shopify.com/s/files/1/0433/4842/6910/files/leriretanedatilesa.pdf
    • https://cdn.shopify.com/s/files/1/0437/4292/0865/files/68377844945.pdf
    • https://cdn.shopify.com/s/files/1/0428/7083/3319/files/nobozekuzez.pdf
    • https://cdn.shopify.com/s/files/1/0428/5366/2883/files/sazujenowigufunudufowil.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_off000091f1.bin
5c6dafe18ba0a6908e7ae9188dcf149a06f3f3e03de474361fa83bb9f53bd4b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91F1 5236 bytes
font_01_sfnt_off0000a397.bin
49a6498dd81ba6294118d7a771448a765dba46e0c01935acc5c8ed44d1e5a171		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA397 10564 bytes

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