Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bb8e64ffc3d6805…

MALICIOUS

PDF

83.7 KB Created: 2020-09-18 17:19:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2efceef043ca93b0c61f928e3943837 SHA-1: 653241eae4de38a590d4c1ef20556d35bc6dfe6d SHA-256: 4bb8e64ffc3d6805089fb2b2dc508e7b5c05df1de729475897d466dd02c3d004
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic match for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. Additionally, it exhibits characteristics of a PDF_SEO_LINK_FARM, suggesting it's part of a larger scheme to distribute malicious links. The embedded URL https://ttraff.cc/wix?keyword=trim+a+slab+vs+slab+gasket is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL, reinforcing the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/wix?keyword=trim+a+slab+vs+slab+gasket
    • https://cdn.shopify.com/s/files/1/0438/1288/0544/files/idautomation_php_barcode_generator_script_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/4696/9237/files/98484647174.pdf
    • https://cdn.shopify.com/s/files/1/0486/3528/1566/files/70570300917.pdf
    • https://cdn.shopify.com/s/files/1/0428/0942/6079/files/40463329754.pdf
    • https://cdn.shopify.com/s/files/1/0465/4333/9678/files/twilight_forest_portal_guide.pdf
    • https://2347d01f-a141-4318-93f1-c4426636b895.filesusr.com/ugd/d2759c_e9daea5e7ef942e88b4c757bbae49e22.pdf?index=true
    • https://9bfe6f1b-2ec8-47b3-b3f4-99edde1d6da2.filesusr.com/ugd/73f3b0_61937025e2d54eff8c87ae11555b56d2.pdf?index=true
    • https://8d404370-561f-40e7-af1d-493a616845bc.filesusr.com/ugd/ba3095_5bd3772ce9c6489fb3ea4d1ef528c55d.pdf?index=true
    • https://ead4847c-fb5b-4b92-b3ec-84dd482e26d1.filesusr.com/ugd/65d6f7_7275a0ff88764eea9ce35983271eb9f1.pdf?index=true
    • https://672ccff1-ae26-4b1b-9ae5-5ad3d69747af.filesusr.com/ugd/a86d68_92632185f20e4f5ab7112b960696007e.pdf?index=true
    • https://da0a638c-29a4-4bce-b026-9db85760da94.filesusr.com/ugd/e3ff21_b80b2822c86344bd9900ba04668b4c5f.pdf?index=true
    • https://71d70a2c-d634-4a26-ac6d-70186d34c005.filesusr.com/ugd/9ea91e_672edc4ca2c84f419fe65ab2591f902a.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0432/6329/5650/files/fejimen.pdf
    • https://cdn.shopify.com/s/files/1/0430/7432/2586/files/maruxefaxej.pdf
    • https://cdn.shopify.com/s/files/1/0463/2566/1853/files/34848764831.pdf
    • https://cdn.shopify.com/s/files/1/0438/4302/7106/files/compressing_mac.pdf
    • https://cdn.shopify.com/s/files/1/0437/0166/5960/files/bootstrap_w3schools.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_off00010a90.bin
72fe27f74c356f137277e631ada5895d0328b9d022dfa758e4dbf1e264919ea3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A90 5216 bytes
font_01_sfnt_off00011c40.bin
f79e25c1d0250a71f0bb153cd6ac5d0d1587062b6787bd4481b83808116fe75e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C40 10872 bytes