Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a5a8b67a40879c…

MALICIOUS

PDF

48.7 KB Created: 2020-08-24 20:50:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d24ff26a38ff0c23f305585aa8c55516 SHA-1: c8dcb29f1265ba89ead8092faf8bc8db6fac1739 SHA-256: e3a5a8b67a40879c6216fb819cb4de730255d27e59ea2d5e831623a53ceb8e1e
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'ttraff.cc'. The document body also contains this URL, suggesting it is the primary lure. The ML classifier strongly indicates maliciousness, and the presence of a link farm points towards an attempt to distribute or phish via these external resources.

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.cc/pify?keyword=apocrifos+del+antiguo+testamento+tomo+v+pdf
    • http://mikexot.englishlutheran.org/uploads/1/3/0/8/130874524/2436782.pdf
    • http://xigir.writeyourfirststory.com/uploads/1/3/1/4/131437774/0c488f03ceaf4a3.pdf
    • http://files.jira-administrator.com/uploads/1/3/2/7/132710679/vabufifenu-zajipamo-sitamad-vomufifedonuvo.pdf
    • http://files.kalinkapetkoff.com/uploads/1/3/1/0/131070718/resuzigi_jajegunosulasut_masar.pdf
    • https://cdn.shopify.com/s/files/1/0438/7697/4747/files/verb_agreement_rules.pdf
    • https://cdn.shopify.com/s/files/1/0439/8520/7454/files/lasixewelos.pdf
    • https://cdn.shopify.com/s/files/1/0428/3318/2886/files/kebotafedidelupena.pdf
    • https://cdn.shopify.com/s/files/1/0428/2384/3996/files/49149558930.pdf
    • https://cdn.shopify.com/s/files/1/0448/1371/3569/files/wipe_me_down_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/6985/6158/files/6193397805.pdf
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/67540957433.pdf
    • https://cdn.shopify.com/s/files/1/0429/3489/4755/files/kitefefururomizekanawa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/jepikite.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/1997/files/bejuginanizeponejalinibi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005909.bin
ebfa89c0f5ed24e7afe2e75aea4c9accc7e128b350341a4be6c75596e676662d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5909 5408 bytes
font_01_sfnt_off00006b55.bin
3d3b097f34a63df818ff8dc6512b2f60639a3b5d07659f5615f5c9f5531a490f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B55 11332 bytes
font_02_sfnt_off0000908c.bin
52e82f317fd07460633fde2b4a13b2271e088719cba8b5abc0141cb327413dbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x908C 16076 bytes
font_03_sfnt_off0000a528.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA528 4324 bytes

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