Malicious PDF — malware analysis report

Static analysis result for SHA-256 1102958c4f53027d…

MALICIOUS

PDF

46.6 KB Created: 2020-08-13 07:15:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8079e838987c3e30dbe113fb35da94d0 SHA-1: 5e27b86f129bd36d753f29f697e6fe358ca5bd7a SHA-256: 1102958c4f53027db02c9eb7366e9475420b5a125d2a87317e4b511174ab40c3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which are designed to appear as legitimate documents but ultimately lead to a malicious redirector. The primary malicious URL identified is ttraff.ru, which is known for redirecting users to potentially harmful content. The document body, though heavily obfuscated, contains references to the malicious URL and other links that contribute to the link farm.

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.ru/wb?keyword=la%20vita%20di%20galileo%20brecht%20pdf
    • http://files.beasttviptv.com/uploads/1/3/0/7/130775402/481fa149243.pdf
    • http://files.freedom-conspiracy.com/uploads/1/3/0/7/130740297/notoxegep.pdf
    • http://files.thirdcinemaproductions.com/uploads/1/3/1/3/131379749/sonazez.pdf
    • http://files.fremonthog2232.com/uploads/1/3/1/4/131453156/3048822.pdf
    • http://files.acousticdesignstudios.com/uploads/1/3/1/3/131380741/jituxemeb_javezu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1107/0357/files/100_statistical_tests_gopal_k_kanji.pdf
    • https://cdn.shopify.com/s/files/1/0446/9984/4762/files/captain_marvel_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/3208/3612/files/27024876070.pdf
    • https://cdn.shopify.com/s/files/1/0434/0531/2154/files/pamisowosowuletuzowinelup.pdf
    • https://cdn.shopify.com/s/files/1/0429/3374/7878/files/10909109143.pdf
    • https://cdn.shopify.com/s/files/1/0441/1251/1128/files/tapafosodizewu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9683/4212/files/lefugogakapegiguwuxomovax.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/86255375270.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/twitch_emote_requirements.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuwizesovipijekugufex.pdf
    • https://cdn.shopify.com/s/files/1/0431/7229/8918/files/25172452470.pdf
    • https://cdn.shopify.com/s/files/1/0436/4143/8366/files/magnificence_affirmation_cards.pdf
    • https://cdn.shopify.com/s/files/1/0432/5729/9097/files/zoroni.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60233972239.pdf
    • https://cdn.shopify.com/s/files/1/0436/1289/7437/files/46959005833.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007551.bin
10f4a0333c275316d2f112c67f302036d8e9b23905bf105a77e283d3641ca776		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7551 5380 bytes
font_01_sfnt_off0000879a.bin
438325c96f17b7d95d8b3a6032aeec983d3a4ff32be5f89b61030d222eef840d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x879A 11184 bytes

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