Malicious PDF — malware analysis report

Static analysis result for SHA-256 15cd62199f490782…

MALICIOUS

PDF

42.4 KB Created: 2020-08-12 23:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1ce2ffa0597db07450c3470731c822b SHA-1: 821c87a72f364f3362f2abc7698ec8256a6d563e SHA-256: 15cd62199f49078210fbaa6e3f4a7cc10256559f9e2905a7dc2514af51bd6c68
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the URL ttraff.com. The document body and embedded links suggest a lure to download further content, likely malicious payloads. The ML classifier strongly indicated maliciousness, supporting the observed redirector behavior.

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/pify?keyword=unlv+academic+calendar+pdf
    • http://files.lebaneseamericanfestival.com/uploads/1/3/0/8/130814900/2033953.pdf
    • http://files.flowerofcarmelhermitage.org/uploads/1/3/0/9/130970022/sutenuj_zukafomuvel_pufibidelekapop.pdf
    • http://files.fsanase.org/uploads/1/3/1/1/131163976/kozilenafivi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0443/9366/0582/files/full_nfl_schedule_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/4882/8065/files/tavuxabinol.pdf
    • https://cdn.shopify.com/s/files/1/0432/7833/6165/files/segmentation_targeting_positioning_example.pdf
    • https://cdn.shopify.com/s/files/1/0428/4186/6403/files/38944290496.pdf
    • https://cdn.shopify.com/s/files/1/0435/6590/8136/files/33890686001.pdf
    • https://cdn.shopify.com/s/files/1/0434/5466/0758/files/andante_andante_piano_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/1483/1780/files/84247239439.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/naughty_america_login.pdf
    • https://cdn.shopify.com/s/files/1/0434/1311/0951/files/persuasive_speech_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/8015/5290/files/58216399676.pdf
    • https://cdn.shopify.com/s/files/1/0434/2638/1975/files/89491481035.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c00.bin
27a96acac47bf773561eb83173396dce1db55e65d01e83f0f3cdabdf6f3ea50d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C00 4772 bytes
font_01_sfnt_off00006c15.bin
a94eb52584d522f469ee8464e87dacc98078e700969b98e1c48b93853c417b7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C15 10212 bytes
font_02_sfnt_off00008efc.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EFC 4324 bytes

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