Malicious PDF — malware analysis report

Static analysis result for SHA-256 be63a0e71a4ccc55…

MALICIOUS

PDF

136.4 KB Created: 2020-08-15 01:44:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d76e5fb235b2efe9c6712c2205e3036 SHA-1: b70b320b2d2965b75fde9ddd1667680340a517dc SHA-256: be63a0e71a4ccc55406a0c92f7568af25dd8a78d4123d10065fdb27c2d63180c
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to its inclusion of a link to a known malicious redirector, ttraff.com. It also contains a large number of external links, characteristic of a link farm. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the finding. The primary attack pattern involves luring users through these links, likely to a phishing site or for further malware delivery.

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=everglades+city+fishing+report
    • http://files.brandnewdaywellness.com/uploads/1/3/0/7/130739284/1926600.pdf
    • http://files.beejaysenglish.com/uploads/1/3/0/7/130775950/junemijuji.pdf
    • http://files.menkisworks.com/uploads/1/3/1/4/131453924/a331cc27f4a3836.pdf
    • http://files.autismovercomers.com/uploads/1/3/0/8/130873848/kajagotu_zoxologibeziki_duxiforusakex_xenurefaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0437/files/8504853667.pdf
    • https://cdn.shopify.com/s/files/1/0433/7650/9080/files/lilisete.pdf
    • https://cdn.shopify.com/s/files/1/0429/7162/7673/files/wabolurufa.pdf
    • https://cdn.shopify.com/s/files/1/0434/5239/9773/files/87389989461.pdf
    • https://cdn.shopify.com/s/files/1/0431/8412/8151/files/libro_apocrifo_de_juan.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0719/files/ccht_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tedogunugovosilogupex.pdf
    • https://cdn.shopify.com/s/files/1/0431/4434/7799/files/43064568802.pdf
    • https://cdn.shopify.com/s/files/1/0435/2393/2311/files/morula_blastula_gastrula.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/english_course_book_for_kindergarten.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/human_psychology_facts_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/7982/6582/files/zobosigenozonosenarijabo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1356/0727/files/hokkaido_map.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_off0001cb95.bin
792ec0c3695af2e5b9b167d2681a978a88f89f4ced2790a8bbdf3f11b2709814		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB95 5536 bytes
font_01_sfnt_off0001de6a.bin
217e2ed3fd9083a71e5576d92808dd98e043a57d5739b3ac248f92b13ab1a3fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DE6A 16980 bytes

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