Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5926e597a814d9b…

MALICIOUS

PDF

44.6 KB Created: 2020-08-28 23:47:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fce417075f083102a50d7f3c10196b46 SHA-1: 1020170e80bbf27f393ea8a8c2a93503e14e8656 SHA-256: f5926e597a814d9b4818bc98b3fbc023328cda9ad615e8fe6a5aff89bc28603d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a download for "the startup of you download". This link, https://ttraff.cc/wix?keyword=the+startup+of+you+download, is designed to lead users to malicious infrastructure. The document also features a large number of external PDF links, many pointing to benign content, likely as part of an SEO link farm tactic to improve search engine ranking for malicious content. No scripts were extracted from this sample.

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/wix?keyword=the+startup+of+you+download
    • https://static.usrfiles.com/ugd/b8c837_d1d7f7b7a9fa4410bb39b8d6906269d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_7337b047cace4f24a068a8c5ea9ac969.pdf
    • https://static.usrfiles.com/ugd/b8c837_8b233d4757c540bca3c746b29c17878a.pdf
    • https://static.usrfiles.com/ugd/b8c837_2977d4f4b08f41228e7cb93640987667.pdf
    • https://static.usrfiles.com/ugd/b8c837_0680102c75d64b889e4aaa0fcce7aad8.pdf
    • https://cdn.shopify.com/s/files/1/0437/7794/9848/files/best_love_quotes_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2878/3002/files/22441201752.pdf
    • https://cdn.shopify.com/s/files/1/0436/4078/3008/files/cisco_ccna_voice_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/7378/1408/files/what_is_inception_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/0185/5646/files/mejiwonawolojazuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/7496/1059/files/apptio_tbm.pdf
    • https://cdn.shopify.com/s/files/1/0434/7750/0056/files/pomofigiwanab.pdf
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/merotaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/2410/5121/files/gy-_gps6mv2_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/8660/0597/files/velas_de_confirmacion.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_off00006f76.bin
cee14ce797d2c0f9f171bf11133e8ed996cdf3c144c692fb5146e0ca0d702a7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F76 5272 bytes
font_01_sfnt_off00008174.bin
b5e3ff8819387b552259ce62b3f8c5f4bf0462cdc04bcda09dc5f0feaa6cf8a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8174 10416 bytes