Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaea7d06a16e833f…

MALICIOUS

PDF

44.1 KB Created: 2020-09-04 07:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9f56865dcf88383564620219015fe5f SHA-1: 9e72abc544fec0b3a1977adeb1e62ff6588e7d19 SHA-256: eaea7d06a16e833f0cf3fdca0f462f864982a171ca914f1e1e2f1de5a25d1e10
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a significant number of embedded links to external PDF files, indicating a link farm or SEO manipulation tactic. One of these links, 'https://ttraff.me/wix?keyword=dead+island++android', points to known malicious redirector infrastructure. The document body contains garbled text but includes the same URLs, suggesting an attempt to disguise the malicious intent.

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.me/wix?keyword=dead+island++android
    • https://static.usrfiles.com/ugd/d1d005_9f715591590343878af282d6016583ab.pdf
    • https://static.usrfiles.com/ugd/3b47cb_edd64df74ae44cab8e7785dd6b58027d.pdf
    • https://static.usrfiles.com/ugd/3aca14_22ecf410079b40008378b263c8827d6a.pdf
    • https://static.usrfiles.com/ugd/9c0842_9ab6c3bddbe043e18d10ef3146f91c45.pdf
    • https://static.usrfiles.com/ugd/d17951_411e2e9b00004fc6be29b0736c3c3b6a.pdf
    • https://static.usrfiles.com/ugd/df4650_fadff5c09a6c49919800acd0f753b569.pdf
    • https://static.usrfiles.com/ugd/b972d5_ba9c3c4ded384e4fbe02077b618dda64.pdf
    • https://static.usrfiles.com/ugd/2b98a3_575081a560f949489c59dff2a4ddb24c.pdf
    • https://static.usrfiles.com/ugd/ab059d_2dc5f41f2e8a47f396d24f58fe12f366.pdf
    • https://static.usrfiles.com/ugd/09c3c7_bab00abfdebe4a8ba7ee6b241278a1ea.pdf
    • https://static.usrfiles.com/ugd/bfd504_3ac3be2f6cd64872b2ebc37293c7b2f4.pdf
    • https://static.usrfiles.com/ugd/de02f3_f04433dd04a2427685a098e2ff34d055.pdf
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/97108884403.pdf
    • https://cdn.shopify.com/s/files/1/0428/8859/3571/files/sevosaxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/9807/0426/files/canonpowershot_s2_is.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_off000068b1.bin
62527cf1aeb0a74ae998284964b0faffcbac43a2118d7eaedef21f7876d17fcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68B1 4816 bytes
font_01_sfnt_off00007916.bin
a2b551832c776e43e00b8e615a36ab5726813e37b79acb53ac974bec532c497e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7916 1792 bytes
font_02_sfnt_off000081ef.bin
c619aa72e97d226ef6d627d3a133a7c0c281fc331bc85db085cd4243a71d8546		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81EF 9812 bytes

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