Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad491c17b61b7ec9…

MALICIOUS

PDF

39.6 KB Created: 2020-08-23 16:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 032c50fdf8e8edc6e16173259df6dcc2 SHA-1: cd1fea9a0c912664ebe9b210438a733c12fdba4c SHA-256: ad491c17b61b7ec96bf3743ad161d20f244a89e92fa0ea25c8664c1033a2a13c
150 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.com, which is disguised as a search result for a 'Bluetooth app for Windows 7'. This suggests a phishing or social engineering attack aimed at directing users to malicious content. The file also contains a large number of links to external PDFs hosted on cdn.shopify.com, indicating a potential link farm or SEO poisoning tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=bluetooth+app++for+windows+7
    • http://files.honorflightkc.org/uploads/1/3/1/4/131453252/4689429.pdf
    • http://files.northwoodsquiltguild.net/uploads/1/3/0/7/130776246/9d87468.pdf
    • http://vupawu.paynesvillece.com/uploads/1/3/1/6/131636612/2667097.pdf
    • https://cdn.shopify.com/s/files/1/0433/9063/2101/files/53076963769.pdf
    • https://cdn.shopify.com/s/files/1/0437/2122/8442/files/zizarofube.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0040/files/62497386800.pdf
    • https://cdn.shopify.com/s/files/1/0427/8734/0454/files/miconia_albicans_canela_de_velho.pdf
    • https://cdn.shopify.com/s/files/1/0435/3556/4949/files/72121002607.pdf
    • https://cdn.shopify.com/s/files/1/0448/5585/3218/files/hiperaldosteronismo_secundrio.pdf
    • https://cdn.shopify.com/s/files/1/0428/4760/0807/files/command_economy_characteristics.pdf
    • https://cdn.shopify.com/s/files/1/0435/7731/1395/files/25704355480.pdf
    • https://cdn.shopify.com/s/files/1/0431/9887/3763/files/ranopixotisixetawuzi.pdf
    • https://cdn.shopify.com/s/files/1/0436/6240/9881/files/cute_babies_images_hd.pdf
    • https://cdn.shopify.com/s/files/1/0431/7616/5536/files/50218838723.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_off00005c8c.bin
00e86d18a12fb685fe7ae554b033e4384572f6866b0212e1143b9aecf4b57a4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C8C 5352 bytes
font_01_sfnt_off00006ed0.bin
df15701df03713e2605a4a36b574517f73ca76ad7e79355267a471eb4afac4b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED0 10196 bytes

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