Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ad5d7a832e0661e…

MALICIOUS

PDF

48.9 KB Created: 2020-07-30 19:16:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e85a48110454bb5e312ca70df8143312 SHA-1: 32a9cde79d2725cf270492e9a3982fa55f13de20 SHA-256: 1ad5d7a832e0661e12db8610084970944b42d90c0ca83ccbe6a78b1b70655ec5
154 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.cc'. Additionally, it hosts a large number of external PDF links, many hosted on Shopify, suggesting a link farm for SEO manipulation or to obscure the final malicious destination. The ML classifier also strongly flagged this PDF as malicious. The document body is heavily obfuscated, but the presence of 'Approaches of leadership pdf' suggests a lure.

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=approaches+of+leadership+pdf
    • http://files.wheresmikeg.com/uploads/1/3/1/6/131637606/1544019.pdf
    • http://files.manningvbsb.com/uploads/1/3/1/3/131381555/fikojosaluzi.pdf
    • http://files.lowestoftcaninesociety.co.uk/uploads/1/3/0/8/130874122/0196c485965560e.pdf
    • http://files.traditionsandrecipes.com/uploads/1/3/1/4/131437779/21f4c2b8.pdf
    • http://files.oxfordshire-epc.co.uk/uploads/1/3/0/7/130738915/tilejirov.pdf
    • https://cdn.shopify.com/s/files/1/0436/9347/3947/files/83206959533.pdf
    • https://cdn.shopify.com/s/files/1/0440/3003/4085/files/giteraba.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/jamavoxomoluput.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/26746288113.pdf
    • https://cdn.shopify.com/s/files/1/0432/7663/2214/files/65196060625.pdf
    • https://cdn.shopify.com/s/files/1/0433/4285/6344/files/sexubezagamajekiketorukaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/7421/4306/files/dofogebilaxidavoluxupusip.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6567/files/giwonenavura.pdf
    • https://cdn.shopify.com/s/files/1/0431/4673/9878/files/40483481128.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/bolifejidibukofuxonabesep.pdf
    • https://cdn.shopify.com/s/files/1/0433/9620/2652/files/67295428763.pdf
    • https://cdn.shopify.com/s/files/1/0431/1177/6416/files/75879228651.pdf
    • https://cdn.shopify.com/s/files/1/0431/0653/3527/files/dupovodotegi.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/86244437488.pdf
    • https://cdn.shopify.com/s/files/1/0428/6572/1503/files/73655771726.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_off000082a0.bin
a0eeae3b6db93280848423d17ebb14d44ebb1dfe5618ba789f24eede928a96ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82A0 4832 bytes
font_01_sfnt_off0000930e.bin
e88f98ff01b437b93ff2dab01c9a8eff6a115f7b92e7f7af24e3221980c5817b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x930E 10196 bytes

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