Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f59f5dc8fc2be03…

MALICIOUS

PDF

87.0 KB Created: 2020-08-10 08:29:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5320af5b1a54e0e02624ce1dca170fe3 SHA-1: e5474295b0e70eb90ce223cdb041077bfe998fed SHA-256: 6f59f5dc8fc2be03063a205fc31b355d5cbc19d52118f2bd2a4792afe66430f6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely the primary malicious objective. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic, indicating a lure for users to click on it. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly suggest a phishing or malicious redirection attempt.

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/pify?keyword=ahmad+shah+abdali+history+in+urdu+pdf
    • http://files.ecofitpt.com.au/uploads/1/3/2/6/132681053/9105361.pdf
    • http://rojulole.somax-consulting.com/uploads/1/3/1/4/131406390/wutomewikibut-zenigelasuz-fubazibamaw.pdf
    • http://files.bathbombspetersburg.com/uploads/1/3/1/0/131069886/143379.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6470/4665/files/vefuwafevad.pdf
    • https://cdn.shopify.com/s/files/1/0433/0510/7620/files/modulo_ritenuta_d_acconto.pdf
    • https://cdn.shopify.com/s/files/1/0440/9311/2472/files/al_azkar_an_nawawi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1624/9767/files/vaxebuwopurunoferof.pdf
    • https://cdn.shopify.com/s/files/1/0438/1242/1789/files/relative_zoom_sens.pdf
    • https://cdn.shopify.com/s/files/1/0433/3332/0872/files/domomemoruw.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/48840458245.pdf
    • https://cdn.shopify.com/s/files/1/0429/2942/2499/files/72830587986.pdf
    • https://cdn.shopify.com/s/files/1/0439/3032/1051/files/spelling_bee_word_list_for_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0433/7935/9900/files/us_work_permit_form.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/waves_audio_plugins.pdf
    • https://cdn.shopify.com/s/files/1/0437/8689/5522/files/busbar_size_calculation_according_to_current.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001271e.bin
a2f30ec6a19c75c9df162d6362d94180ba40c58573ab41ed99494c67c1225173		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1271E 23584 bytes
font_00_sfnt_off0000e4ac.bin
544d006ac806ba28d6c73417fd1882d298db09163614bd94c9a7d5bb6a9d33c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AC 5512 bytes
font_01_sfnt_off0000f73c.bin
85da0e392b5edbf6c003b47050c422b0b8916b2fa8402eb73f353f923055d096		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF73C 15844 bytes

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