Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ed1141d4108c5d0…

MALICIOUS

PDF

32.7 KB Created: 2020-08-12 02:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 927e0121e0fd04f8b231a4a6abe6748c SHA-1: 1e0bdd4e941148208c1ed8181052a1c4184606fa SHA-256: 8ed1141d4108c5d0818d8db7f31c53f81a6485a168a0d11d6f2f20043911cad9
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL points to 'ttraff.com', a known malicious redirector. Additionally, the PDF exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. The document body, though heavily obfuscated, contains the malicious URL. The primary intent appears to be redirecting the user to a malicious site.

Heuristics 3

  • 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.
  • 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=andante+andante+abba+piano+pdf
    • http://files.nacinformation.com/uploads/1/3/1/3/131398250/xupisujiloxuvi-dusadibitiwiv-rikabuk.pdf
    • http://files.directedapparel.com/uploads/1/3/2/6/132695832/085dcdd446.pdf
    • http://files.staywhole.net/uploads/1/3/1/3/131384025/1687405.pdf
    • http://files.prayerknight.com/uploads/1/3/2/6/132680932/09d292d8.pdf
    • https://cdn.shopify.com/s/files/1/0450/7097/5128/files/english_grammar_for_beginners_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ligumugazawebamupewav.pdf
    • https://cdn.shopify.com/s/files/1/0435/7373/9675/files/lubelotise.pdf
    • https://cdn.shopify.com/s/files/1/0437/1172/5723/files/bezalovepap.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32773531818.pdf
    • https://cdn.shopify.com/s/files/1/0434/0583/6438/files/github_readme_link_to_section.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0104/files/53951256822.pdf
    • https://cdn.shopify.com/s/files/1/0428/9635/9580/files/73626342606.pdf
    • https://cdn.shopify.com/s/files/1/0432/4517/4939/files/80080947098.pdf
    • https://cdn.shopify.com/s/files/1/0432/8446/3784/files/jurilajuxidux.pdf
    • https://cdn.shopify.com/s/files/1/0432/8374/2884/files/1472125886.pdf
    • https://cdn.shopify.com/s/files/1/0448/3586/4736/files/buku_agama_islam_kelas_4.pdf
    • https://cdn.shopify.com/s/files/1/0433/9079/5941/files/tres_bien_merci.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_off00004519.bin
79c8242a528da6484c68b8b380d4068efafdce3ff5a02f7fc64f90d18dd82565		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4519 4856 bytes
font_01_sfnt_off000055b0.bin
e04127dca2811c08f414f14a3ec08b639b306c467153f8b0b0592acb7ce49c79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55B0 9372 bytes

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