Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2e53aa1ea020d16…

MALICIOUS

PDF

42.1 KB Created: 2020-08-11 01:29:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 238635e47f1825572444e8ae18a56822 SHA-1: c4af13faeaa0cdb95cee1d0dd69545995ee7269c SHA-256: b2e53aa1ea020d16c093d3159f0f98abec074768fe72cfc5609327ad35c86ec5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=frightful+s+mountain+pdf'. This indicates the document's primary purpose is to redirect users to a malicious site. The presence of numerous other PDF links, many hosted on cdn.shopify.com, suggests a link farm or SEO poisoning tactic to distribute the malicious content. No scripts were extracted, but the malicious link is sufficient evidence of a phishing or redirection attack.

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.cc/pify?keyword=frightful+s+mountain+pdf
    • http://files.287ranchsupplyboutique.com/uploads/1/3/1/1/131163832/2370986.pdf
    • http://sepufutod.richbrownies.com/uploads/1/3/1/4/131437423/fotesekokisizuze.pdf
    • http://files.toughwarriorprincess.com/uploads/1/3/1/3/131380107/3f60e072.pdf
    • http://files.mcgoophotography.com/uploads/1/3/1/8/131871583/dimigenuxedet_xixegonadij_jirerikawizab.pdf
    • https://cdn.shopify.com/s/files/1/0433/9718/5701/files/danasinibopexosela.pdf
    • https://cdn.shopify.com/s/files/1/0435/4405/1864/files/wells_fargo_bank_statement.pdf
    • https://cdn.shopify.com/s/files/1/0431/6777/6919/files/duseko.pdf
    • https://cdn.shopify.com/s/files/1/0449/1840/7335/files/warhammer_40k_8th_edition_rules_vk.pdf
    • https://cdn.shopify.com/s/files/1/0437/8558/4797/files/rewufenewitoderoxagabu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5727/5299/files/37780283305.pdf
    • https://cdn.shopify.com/s/files/1/0431/4877/1488/files/most_of_us_wiz.pdf
    • https://cdn.shopify.com/s/files/1/0437/8938/5885/files/grammar_translation_method_advantages_and_disadvantages.pdf
    • https://cdn.shopify.com/s/files/1/0436/4537/0518/files/kenoxanopatisul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78985131446.pdf
    • https://cdn.shopify.com/s/files/1/0432/0008/6180/files/xikebuxuxugezolepitudude.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_off000065f9.bin
5a32bacc7f36115ac97d7510027a62f5f83793112a845b437947268859710005		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F9 5412 bytes
font_01_sfnt_off00007841.bin
ae2a828e4f279dcc95104c119a797128d56f63c4b3404cc3f2608c03be78df74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7841 10384 bytes

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