Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a2fcab28e770e15…

MALICIOUS

PDF

42.5 KB Created: 2020-08-07 22:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c33c6dd0ff20eb6d63924c555e75a1c1 SHA-1: f1ad85fbecb5feda1913e1d82b9df4c365cb69a6 SHA-256: 1a2fcab28e770e1504bccf5e6108f039012fd4aecfe5c16025fc0c71302fdee9
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to funnel victims to malicious sites. The document also contains a large number of external links, many pointing to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic to increase visibility. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=tipos+de+calderas+industriales+pdf
    • http://kovus.allendaleinsurance.com/uploads/1/3/0/9/130969744/9652736.pdf
    • http://files.wolfespringfarm.com/uploads/1/3/0/8/130814459/vawazo.pdf
    • http://xowozota.completewellnesscenter.net/uploads/1/3/1/8/131856257/6b0a81b545d0.pdf
    • https://cdn.shopify.com/s/files/1/0434/0698/3318/files/ubuntu_install_virtualenv.pdf
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/89384034575.pdf
    • https://cdn.shopify.com/s/files/1/0444/0604/6886/files/ge_advantium_120_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/0841/6168/files/i_hate_being_sober_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/8094/1721/files/tisune.pdf
    • https://cdn.shopify.com/s/files/1/0432/3727/7855/files/6258821677.pdf
    • https://cdn.shopify.com/s/files/1/0434/0455/8486/files/a_survey_of_network_anomaly_detection_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0435/2350/6336/files/nikedefiwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9387/6118/files/dulezurujadotoliwamawi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3810/4985/files/abbyy_transformer_3._0_full_crack.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/nesevibax.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_off000067be.bin
27a3856337970c7e7f72a79782debe9e186410f8f6ae9ec057f8dc620f1f7eeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67BE 5100 bytes
font_01_sfnt_off00007922.bin
037a9645ce016eb9aa59af5d7bc95a19ba9c738400f3b0c3ea0f98f21095c66c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7922 10452 bytes

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