Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a2b720265f5c777…

MALICIOUS

PDF

48.1 KB Created: 2020-08-19 20:04:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: daa07f6ce1b27a4b8ec5d5cb06a3a1b3 SHA-1: 933ef9a297a67730d768b6fa61474bc2ddc32ff2 SHA-256: 9a2b720265f5c777b2456fcc2022eb6fb8e5fac0f9fa3a94be4132d31ec8ba61
152 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, identified as a PDF link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=atmosphere+full+form', points to known malicious redirector infrastructure. The document body text also contains this URL, suggesting an attempt to lure users to malicious content under the guise of 'Atmosphere full form'. No scripts were extracted, but the extensive link farm and malicious redirector strongly indicate a phishing or redirection attack.

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=atmosphere+full+form
    • http://files.mivux.ch/uploads/1/3/2/6/132695354/5d549c4efbf63.pdf
    • http://files.i-authenticate.com/uploads/1/3/1/4/131409274/8603485.pdf
    • http://files.larryssportsexchange.com/uploads/1/3/0/8/130874128/folerezome.pdf
    • http://files.unitywinterguard.org/uploads/1/3/0/7/130739456/1756453.pdf
    • https://cdn.shopify.com/s/files/1/0437/8938/5885/files/1364466924.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38746106010.pdf
    • https://cdn.shopify.com/s/files/1/0434/1897/6408/files/lambda_function_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0431/1711/7589/files/54205132140.pdf
    • https://cdn.shopify.com/s/files/1/0432/2282/7165/files/titevixafozusozinuvida.pdf
    • https://cdn.shopify.com/s/files/1/0434/0059/3557/files/jawozobugemibamatelape.pdf
    • https://cdn.shopify.com/s/files/1/0438/1815/6192/files/bft_rigel_5_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0865/files/xewukafeluwamu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1634/files/pomipumukezo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9756/3037/files/wogexirekumikuzup.pdf
    • https://cdn.shopify.com/s/files/1/0437/5920/6558/files/bullzip_printer_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e63.bin
1a465d8ceedec054d98769e7d966b0a08db5e7c305b1ade0142dc3ba3a6c48b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E63 4648 bytes
font_01_sfnt_off00007e34.bin
696f5634d71781a65bac28f1b0645d3716ed96bea4dc511701fbc9cb54480eb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E34 11780 bytes
font_02_sfnt_off0000a5b9.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5B9 4324 bytes

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