Malicious PDF — malware analysis report

Static analysis result for SHA-256 3887834eaa14c3c9…

MALICIOUS

PDF

41.3 KB Created: 2020-08-07 18:28:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0a64aeec5c369c56141745830271f7c SHA-1: 4a07a3182acd220c01146651f707e43b1d2cdaa0 SHA-256: 3887834eaa14c3c91f04b2b232d1a8a3972ab878c749b71964a3048f436f4f54
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=ansible+tutorial+pdf+tutorialspoint'. This URL is embedded within the document body, disguised as an 'Ansible tutorial pdf tutorialspoint'. The PDF also exhibits characteristics of a link farm, with numerous external links, many of which point to Shopify domains. The primary malicious link is the most critical IOC, as it is designed to redirect the user to further malicious infrastructure.

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.cc/pify?keyword=ansible+tutorial+pdf+tutorialspoint
    • http://puxinofi.loveshackcurbside.com/uploads/1/3/0/7/130738970/5845328.pdf
    • http://files.divorcebetterknoxville.com/uploads/1/3/1/4/131453247/5606819.pdf
    • http://files.hooperrealty.net/uploads/1/3/1/4/131438639/9112168.pdf
    • http://paboju.marilynkelley.net/uploads/1/3/1/4/131406149/ridovukegow_vusuzapekozet_difete.pdf
    • https://cdn.shopify.com/s/files/1/0432/4291/3952/files/32835911278.pdf
    • https://cdn.shopify.com/s/files/1/0429/1824/8601/files/62176949250.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/zobalujewaxij.pdf
    • https://cdn.shopify.com/s/files/1/0431/6351/7092/files/geographical_location_of_pakistan.pdf
    • https://cdn.shopify.com/s/files/1/0432/5939/6254/files/biology_reference_books_for_neet.pdf
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/ccna_voice.pdf
    • https://cdn.shopify.com/s/files/1/0434/5652/8544/files/zoladofujexojak.pdf
    • https://cdn.shopify.com/s/files/1/0428/9875/1641/files/dafivufekabuzuzusikifud.pdf
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/crooked_smile_j._cole_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0433/8427/5100/files/fuguvufaluwepopatiw.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_off000062d2.bin
ad61d03bad2e6878642ca4c8e6a29c4ec6a71110b41dab430be9a88a5b323c1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62D2 5164 bytes
font_01_sfnt_off0000746c.bin
208feaafa413628be3c924af5b94673c297447ef62d820d62f752b815257f2fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x746C 10512 bytes

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