Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0318d99c923a8f5…

MALICIOUS

PDF

48.0 KB Created: 2020-08-26 13:26:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9939942196ae2e6fbff2c628851fa3c4 SHA-1: 95aa7b4d909500beab8b626c4dd12e1f748d01f2 SHA-256: a0318d99c923a8f518214fd01d5a10bec0f3a4b1fdfc56d1e85002770f28fa21
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the target URL, suggesting a lure to a malicious site. The presence of multiple embedded PDFs hosted on various domains, including Shopify, indicates a link farm strategy to improve search engine ranking and potentially distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=quip+electric+toothbrush+review
    • http://vifirat.celebratewithstringsattached.com/uploads/1/3/0/8/130874472/sizagozipomotegut.pdf
    • http://benenaf.cdisbell.online/uploads/1/3/1/4/131437130/mamoja_mefamakat.pdf
    • http://files.gimnaziapetrich.com/uploads/1/3/2/6/132682124/rerawamenapuzide.pdf
    • https://cdn.shopify.com/s/files/1/0432/3147/7922/files/50027182386.pdf
    • https://cdn.shopify.com/s/files/1/0439/2088/3880/files/54407425089.pdf
    • https://cdn.shopify.com/s/files/1/0437/4773/7754/files/after_great_grief_a_formal_feeling_comes.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/coloring_sheets_flowers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/futikuzazojexopuvenewipu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5430/8245/files/windows_movie_maker_tutorial_2018.pdf
    • https://cdn.shopify.com/s/files/1/0434/4463/3750/files/sat_books_free_2017.pdf
    • https://cdn.shopify.com/s/files/1/0433/9774/2750/files/85636375292.pdf
    • https://cdn.shopify.com/s/files/1/0437/2316/1768/files/34826912623.pdf
    • https://cdn.shopify.com/s/files/1/0435/4618/1787/files/gevigibuwub.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/vanobarosatupixefebuzene.pdf
    • https://cdn.shopify.com/s/files/1/0436/3137/8590/files/rizifizuxuwanami.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5682/files/81170285593.pdf
    • https://cdn.shopify.com/s/files/1/0434/0629/5196/files/minecraft_forum_1._8_mods.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_off00007bb9.bin
ff67f774e7ab3005067afd527c893c14b2d1ba9682112ea190387b08902275e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB9 5164 bytes
font_01_sfnt_off00008d50.bin
8e1f7bf9ac9da1261bcb401e60c1d4ca7dbb191f36a9e7673553849c4dc4cbb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D50 11472 bytes