Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f475a343f1f93a6…

MALICIOUS

PDF

43.1 KB Created: 2020-08-29 18:08:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8ec142c05d83788bd3093181de90000 SHA-1: 7d7b9ac48b74f6e99b4a33bf9405e2358ba7edd0 SHA-256: 4f475a343f1f93a638fdd473b09731ba24b5e12254f74b6c2d1889a8332c2e66
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body also contains the same URL, presented as a link to a 'hidden figures book pdf'. This suggests a social engineering lure to trick users into visiting a malicious site. The PDF also contains a large number of external links, many pointing to Shopify, indicating a potential link farm for SEO manipulation or traffic redirection.

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/wix?keyword=hidden+figures+book+pdf
    • https://cdn.shopify.com/s/files/1/0431/2943/8370/files/69012909435.pdf
    • https://cdn.shopify.com/s/files/1/0455/6567/3637/files/learning_english_worksheets_for_adults.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7308/files/2841814564.pdf
    • https://cdn.shopify.com/s/files/1/0465/2865/9614/files/android_apk_file_from_server.pdf
    • https://cdn.shopify.com/s/files/1/0434/7917/1222/files/senuz.pdf
    • https://cdn.shopify.com/s/files/1/0440/1253/5958/files/89719169905.pdf
    • https://cdn.shopify.com/s/files/1/0428/2331/9715/files/vemenififesun.pdf
    • https://cdn.shopify.com/s/files/1/0438/2251/4338/files/call_of_duty_pc_terbaru.pdf
    • https://cdn.shopify.com/s/files/1/0430/3601/6802/files/sufuxisutexiloxavotoked.pdf
    • https://cdn.shopify.com/s/files/1/0440/1247/0422/files/valedictory_speech_template.pdf
    • https://static.usrfiles.com/ugd/b8c837_e62cfd464b1a416fb85931d185a71ad7.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f3a53aed817421298ef206ac3598351.pdf
    • https://static.usrfiles.com/ugd/b8c837_a3c3082f7c82491f8803818f1078a616.pdf
    • https://static.usrfiles.com/ugd/b8c837_b1b6dd5e34a34c318935621fec93e880.pdf
    • https://static.usrfiles.com/ugd/b8c837_5b1d0a83b5f24a71985914db063d5bbf.pdf
    • https://static.usrfiles.com/ugd/b13fd1_7c691fdfee6d460bbc627aff5a527ef9.pdf
    • https://static.usrfiles.com/ugd/b8c837_70b9141eab82439f9b62e8d9d77b190e.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a33531450564888a887ad1e91c0cd02.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_off00006912.bin
53ac90625cbfa9753b0842bea94f9b19294ce50da8dea444471f4dcffdc67fd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6912 5132 bytes
font_01_sfnt_off00007a90.bin
e876d3dd3bc6997af6fa938fea4f1b92b63969c3921d337ac2da28f4d5ed213f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A90 10472 bytes

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