Malicious PDF — malware analysis report

Static analysis result for SHA-256 660fa06df09153fa…

MALICIOUS

PDF

36.6 KB Created: 2020-08-01 15:35:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e84160c28ab8bc81a3fa2deffc841c5 SHA-1: 01cca3fd6e0180a9ca774b50f25b8dd646b8cbd4 SHA-256: 660fa06df09153faffb5bccd9c73e1ffbd77520fa8815e4e7fd898ac5aa60bd1
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate downloads, but the primary link redirects to a known malicious redirector. The document body and embedded links suggest a lure to download a PDF related to 'The summer I turned pretty', which is likely a pretext to drive traffic to malicious infrastructure. No scripts were extracted, but the PDF structure and embedded links are indicative of a phishing or redirection attack.

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=the+summer+i+turned+pretty+pdf+download
    • http://files.keyboardmelodiesforseniors.com/uploads/1/3/2/6/132681495/7125080.pdf
    • http://files.marshaclarkart.com/uploads/1/3/1/4/131438759/550351a7.pdf
    • http://files.normansignsanddesigns.com/uploads/1/3/0/7/130740323/jitidutixedax.pdf
    • http://files.iwonatokcwilde.com/uploads/1/3/0/8/130874015/duxalagelogagorid.pdf
    • http://files.chrismurraywheelworks.com/uploads/1/3/1/8/131871622/demapakusido.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/3175/6957/files/94010742507.pdf
    • https://cdn.shopify.com/s/files/1/0428/6621/3031/files/7598363672.pdf
    • https://cdn.shopify.com/s/files/1/0432/5100/7638/files/72490720310.pdf
    • https://cdn.shopify.com/s/files/1/0436/9947/0486/files/gapigegixotojajig.pdf
    • https://cdn.shopify.com/s/files/1/0437/8266/8437/files/87378343670.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1733/files/bozulejatasa.pdf
    • https://cdn.shopify.com/s/files/1/0435/3359/8880/files/59536788932.pdf
    • https://cdn.shopify.com/s/files/1/0437/9040/1687/files/11900684280.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/lalow.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004542.bin
9641a31567a67315db778ae086c3b7ddb95388a85d40bd21986d87b0999d902d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4542 5308 bytes
font_01_sfnt_off00005738.bin
5e88ba4ad013b4e08fbb24c509a7759ac9eaa03a967abd7d326618bdbf73a9cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5738 9432 bytes
font_02_sfnt_off00007754.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7754 4324 bytes

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