Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eefd763aad24a88…

MALICIOUS

PDF

44.6 KB Created: 2020-08-31 20:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fb35afbefbb64d39b3fc4960153d280 SHA-1: 78263f71707ab2a9258becf1898295b8ac58ab67 SHA-256: 9eefd763aad24a88f53615073af2ec8b37648ddbf5f2fcb7c2a675a93eb29e7e
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs hosted on platforms like Shopify. The document body, though heavily obfuscated, contains the same malicious URL. The primary attack vector appears to be luring the user to a malicious site via the embedded 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.com/pify?keyword=logical+thinking+meaning+pdf
    • https://cdn.shopify.com/s/files/1/0433/2129/5003/files/501_science_experiments.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2054/files/37191022291.pdf
    • https://cdn.shopify.com/s/files/1/0433/3115/8175/files/python_list_partition.pdf
    • https://cdn.shopify.com/s/files/1/0432/3747/4472/files/wumigekuzupeliro.pdf
    • https://cdn.shopify.com/s/files/1/0434/5305/5128/files/73538006663.pdf
    • https://cdn.shopify.com/s/files/1/0431/2589/9421/files/selanuzizeto.pdf
    • https://cdn.shopify.com/s/files/1/0437/6055/0046/files/sorozafesenipapujewo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8628/files/90720845607.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/the_murderess_alexandros_papadiamantis.pdf
    • https://cdn.shopify.com/s/files/1/0437/2643/8550/files/26297566418.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6a3ec104de940039daacf2f0f0ef7af.pdf
    • https://static.usrfiles.com/ugd/b8c837_034fe068f00c4feab4e6424493976977.pdf
    • https://static.usrfiles.com/ugd/51c472_66dd27ee153345508d1f4b4ece0b65a1.pdf
    • https://static.usrfiles.com/ugd/e3ff21_4b13947007464e6499c32eeba0806008.pdf
    • https://static.usrfiles.com/ugd/5438e3_8b088c04bd4a4d6aac695a450eb2e142.pdf
    • https://static.usrfiles.com/ugd/3826db_da173772c4ae4c43a3faef17d8c17292.pdf
    • https://static.usrfiles.com/ugd/451461_be77736a91894db6a0f2eb52399512d2.pdf
    • https://static.usrfiles.com/ugd/ac51ce_b0717863fa3745a39e1fe2031612467a.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_off00006c95.bin
802d04f0fa6b2b51e59e5cbb80f6a8ccc1e3b5018062b3e277b26d8cdb641f06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C95 5300 bytes
font_01_sfnt_off00007e80.bin
9dc3eb31bd36a040be94e3915c3d6aaf8e26335c32ced65c780ea6cdbf7b0cd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E80 12016 bytes

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