Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c81b5c3eb07a97c…

MALICIOUS

PDF

49.2 KB Created: 2020-08-14 15:15:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab63f56f5062e213159a89f47a43c30a SHA-1: 76d5f9b6e91ffe94ca6df6a9d0fb6df6b4a26259 SHA-256: 6c81b5c3eb07a97c9f1096175edc232b3ddfb19a3bc3fda43085ca935abd7af6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to a malicious site. The presence of many external PDF links further indicates a link farm or redirection strategy.

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=eg+j+swap+guide
    • http://files.margek.com/uploads/1/3/0/9/130969981/rujawepomiruv.pdf
    • http://files.authorkarenredmond.com/uploads/1/3/1/3/131378852/13125aea.pdf
    • http://files.mastersofmasternodes.com/uploads/1/3/1/6/131606284/rofixoxemuw.pdf
    • http://files.frommairpad.com/uploads/1/3/0/9/130969966/wurewe_banonirevibu_jojajivi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gujogu.pdf
    • https://cdn.shopify.com/s/files/1/0439/9307/1774/files/tiboko.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9157/files/flip_table_ascii.pdf
    • https://cdn.shopify.com/s/files/1/0441/1283/8808/files/42037127086.pdf
    • https://cdn.shopify.com/s/files/1/0437/0238/6856/files/wevubinirawofus.pdf
    • https://cdn.shopify.com/s/files/1/0432/8692/1376/files/naxubowitemejop.pdf
    • https://cdn.shopify.com/s/files/1/0432/3157/6231/files/autodwg_dwg_to_converter_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/2412/0984/files/89938631834.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kosetomamevisired.pdf
    • https://cdn.shopify.com/s/files/1/0429/9964/4314/files/counting_stars_downloads.pdf
    • https://cdn.shopify.com/s/files/1/0430/0311/7719/files/banking_awareness_by_arihant_publication.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007775.bin
c6830f4c3e6018755d8bbf3018cbfcd4630b052dfc170847642827b8aaa19cf1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7775 5124 bytes
font_01_sfnt_off00008915.bin
3650143b9c086c533d0cbaf2acaf74ac5684a76bf660bcb320ac23d7ef133915
pdf-font-stream PDF embedded font (sfnt) at offset 0x8915 15044 bytes