Malicious PDF — malware analysis report

Static analysis result for SHA-256 01aaf03be6d70695…

MALICIOUS

PDF

48.3 KB Created: 2020-09-01 20:45:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f65ada3ea1a3ecc6041059106ba62af SHA-1: 8ef3251d679f86c2a4728cca5e6d5f680832d418 SHA-256: 01aaf03be6d7069506c379c818185d55819d38521655e7149ccf0e388b31006d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL and text related to a "Monk brewmaster pvp guide", suggesting a lure to trick users into clicking the malicious link.

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/wix?keyword=monk+brewmaster+pvp+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/2266/1278/files/95275907256.pdf
    • https://cdn.shopify.com/s/files/1/0433/4914/7816/files/ines_mezine_en.pdf
    • https://cdn.shopify.com/s/files/1/0428/9599/9129/files/pebanunupuvubedaxu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2672/6568/files/figasabumuzoxaniwurija.pdf
    • https://cdn.shopify.com/s/files/1/0435/6059/9711/files/the_minto_pyramid_principle_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4718/1718/files/faxojowoletuvifawudisu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9965/9176/files/listening_test_1_dreamtime_travel_agency_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/2457/9736/files/lejuvavuzafodawoxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/kuxaropizav.pdf
    • https://cdn.shopify.com/s/files/1/0434/5485/7377/files/kovale.pdf
    • https://cdn.shopify.com/s/files/1/0430/8054/8505/files/kezikufuzetuzi.pdf
    • https://static.usrfiles.com/ugd/9ea9b6_e4125baec68d4251a741685460d6b0a8.pdf
    • https://static.usrfiles.com/ugd/4cf28d_2671896c1bd946c58e0efbf62839ae21.pdf
    • https://static.usrfiles.com/ugd/d1c05f_803e3cc405d94d9e8533a39c2f8531b2.pdf
    • https://static.usrfiles.com/ugd/ae15ca_cdd184e4e73c4526a79ee688992534f4.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_off00007d4e.bin
86a62ec9ee37d4ac10bf46caead0edb523015ace20d74f02ff66f1fd166b4d1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4E 5608 bytes
font_01_sfnt_off0000906c.bin
4050d6994ae215ea516d79c05316a8811fcaf13c0187acaf40dbf97a5eccd13a
pdf-font-stream PDF embedded font (sfnt) at offset 0x906C 10484 bytes