Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7af3365b1adbd5a…

MALICIOUS

PDF

43.7 KB Created: 2020-09-07 10:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3f27dac1b8f9c3290df3a2126f05ad59 SHA-1: 8f666f0f3aa18795c4eb5754651314855d8a6391 SHA-256: d7af3365b1adbd5a248cef3e82801aad10f5f27b8c19aa13e88244965f47d66a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. Additionally, PDF_SEO_LINK_FARM suggests the document is part of a link farm designed to attract traffic. The embedded URLs, particularly the one leading to ttraff.me, are suspicious and likely serve as the primary mechanism for redirecting users to malicious content.

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.me/wix?keyword=arterial+line+procedure+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/apparaitre_hors_ligne_messenger_android_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3484/4059/files/bewars_movie_audio_songs_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/0467/3430/files/best_tires_2016_consumer_reports.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8937/1044/files/damirejus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4995/7029/files/85439539869.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3005/9940/files/32669062834.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6346/7414/files/noxanomef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6454/8762/files/java_collections_sort.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/7922/2694/files/pelegezenotaxijogopiwara.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7ba596_1f6c0a72a37e4719a0d5ffdef418ae01.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0adedf_43e21af8dd1f4779b3c5fc1e13b70c00.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/035627_9152891f3dc446668ddb191cb0bbdbd3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7c41c1_e284a65e8bc943e88f74353fecc86ca0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ea2f88_b476a054096a465fa5a1fb3ca57c4383.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F01 4960 bytes
SHA-256: e870749c7e47d15ae37bd9d7455d261207088f85fdf36469164c93c7cb3c1fb1
font_01_sfnt_off00007ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF2 10080 bytes
SHA-256: 07a36344338b3fb91ca3dd60de638e53ae36d4d5122f66bb2042929e2352997c

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