Malicious PDF — malware analysis report

Static analysis result for SHA-256 e08aa93ffdcc729c…

MALICIOUS

PDF

42.0 KB Created: 2020-09-01 02:10:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e5d08f904827514e21588f5b275bda4 SHA-1: 4e8cc6c717c482c844d89af6b136a15d53bf15a9 SHA-256: e08aa93ffdcc729c29a605fe93662b4b416d67bf9872a1eee78bbe71de8ebd06
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.ru/wix?keyword=sea+vee+390z+performance', is flagged as a known malicious redirector. The document body is heavily obfuscated but contains this URL, suggesting the primary purpose is to lure users to malicious sites. No scripts were extracted, and the document body itself does not provide clear user-facing content beyond the embedded URLs.

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=sea+vee+390z+performance
    • https://static.usrfiles.com/ugd/b8c837_c642ab95ce4f461a8a52c654fe649325.pdf
    • https://static.usrfiles.com/ugd/8b2c09_da6c7d5c0da64057b3545d4969f4cc52.pdf
    • https://static.usrfiles.com/ugd/b8c837_46727d6a9e3a44e880657e6f3428764c.pdf
    • https://static.usrfiles.com/ugd/b8c837_ffaf3c61f6b24b06917941de46807d89.pdf
    • https://cdn.shopify.com/s/files/1/0436/3137/8592/files/75826223630.pdf
    • https://cdn.shopify.com/s/files/1/0428/1414/4675/files/continents_and_oceans_map.pdf
    • https://cdn.shopify.com/s/files/1/0462/3918/7104/files/cleartext_traffic_not_permitted_android_9.pdf
    • https://cdn.shopify.com/s/files/1/0433/9322/0758/files/bajidarezutupebotofojop.pdf
    • https://cdn.shopify.com/s/files/1/0435/9671/0047/files/i_am_aldolpho_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9367/2604/files/47375066103.pdf
    • https://cdn.shopify.com/s/files/1/0433/0081/5006/files/bajugunoxet.pdf
    • https://cdn.shopify.com/s/files/1/0433/9597/3283/files/statistical_methods_for_the_social_sciences_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/5371/7406/files/my_autograph_video_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/8266/2553/files/buddhism_in_chinese_history.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_off000064fa.bin
ee46c3867730c76bdd859d2d104d1dd73fa3ee4d4f4b3dd80a1475d914c055b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x64FA 5624 bytes
font_01_sfnt_off0000781b.bin
cf0e6d94d17588d4d96501e236e6f805e69a15ca2add3552f59a40a7dd4861f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x781B 10232 bytes