Malicious PDF — malware analysis report

Static analysis result for SHA-256 27d7160551d02ad9…

MALICIOUS

PDF

70.5 KB Created: 2020-08-20 08:23:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7d96e94aefbeecca9efd1f1bdc80c7f SHA-1: e5bf1d5a1631b413fb29cc663d378acf45ae46cd SHA-256: 27d7160551d02ad914cd468a877d69e166be3da529b6b067745fc64d5047ae3e
152 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, ttraff.cc, which is designed to lead users to further malicious content. The document also features a large number of external PDF links, many hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute content through a seemingly legitimate platform. No scripts were extracted, but the presence of the malicious redirector and the link farm strongly indicate a malicious intent to redirect users to harmful sites.

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=bambai+tamil+songs
    • http://files.missmcdonald.com/uploads/1/3/0/8/130874134/bc23d518da9640e.pdf
    • http://files.aliseprice.com/uploads/1/3/1/3/131383743/tolenaveg-motisajot-koxipubemubiful-fopopo.pdf
    • http://files.ponderosaguild.org/uploads/1/3/1/3/131382700/bc17f36e6.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/siliranapizonovojupezuweb.pdf
    • https://cdn.shopify.com/s/files/1/0440/9199/8360/files/jibapobudor.pdf
    • https://cdn.shopify.com/s/files/1/0432/1856/7335/files/18347670881.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/parisibudipaxetiwori.pdf
    • https://cdn.shopify.com/s/files/1/0432/4117/7252/files/tejotota.pdf
    • https://cdn.shopify.com/s/files/1/0431/7098/8196/files/factores_ambientales_bioticos_y_abioticos.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5235/files/kalnirnay_january_2018_marathi_calendar.pdf
    • https://cdn.shopify.com/s/files/1/0432/6398/3769/files/vumenar.pdf
    • https://cdn.shopify.com/s/files/1/0433/2398/1979/files/kavinifuvok.pdf
    • https://cdn.shopify.com/s/files/1/0435/1007/1460/files/police_report_sample_for_lost_passport.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000aca6.bin
f3be893a5fe32389b42c903f5de9cc1b48e6fa09c72e7c33ddb59ed279e13305		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xACA6 9628 bytes
font_00_sfnt_off00009b63.bin
685322cefd223345ef79f037bbb1d0d09c13f559b3ccc7291bd6bd840720fe05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B63 5100 bytes
font_02_sfnt_off0000c622.bin
9de47cee1da27497f618b444de79a736edd127540b95aa6f2e154a8af28217f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC622 15940 bytes
font_03_sfnt_off0000f743.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF743 16164 bytes

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