Malicious PDF — malware analysis report

Static analysis result for SHA-256 08b88a24a3505b3a…

MALICIOUS

PDF

64.6 KB Created: 2020-08-24 00:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93ec942d193f05cc3c6ac2a1e697106e SHA-1: 4f8a92ead0b0af07b19095b8d1458e6752da2008 SHA-256: 08b88a24a3505b3a420339a1dbf20b6376b5007b1904b167756b861af1871b35
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=autocad+commands+symbols+pdf'. This URL is presented within the document body, disguised as a search result for AutoCAD commands. The PDF also hosts a large number of external links, many of which are to Shopify-hosted PDFs, suggesting a link farm or SEO manipulation tactic to drive traffic to the malicious redirector.

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=autocad+commands+symbols+pdf
    • http://files.dregerracing.com/uploads/1/3/1/6/131606951/xexasuxuvonisagexeju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0462/7827/9317/files/weather_report_satellite_map.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/deruvolefosazurogitew.pdf
    • https://cdn.shopify.com/s/files/1/0431/2370/3969/files/guromuzamudajer.pdf
    • https://cdn.shopify.com/s/files/1/0437/2129/3974/files/adding_and_subtracting_decimals_worksheets_7th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0433/8856/7706/files/46703788358.pdf
    • https://cdn.shopify.com/s/files/1/0430/9889/8592/files/xikan.pdf
    • https://cdn.shopify.com/s/files/1/0448/5667/2418/files/pov_inspection_check_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/5513/7447/files/99164282546.pdf
    • https://cdn.shopify.com/s/files/1/0428/7227/5103/files/gosefubuzamoj.pdf
    • https://cdn.shopify.com/s/files/1/0457/3347/8566/files/vupexusuxexivokewosam.pdf
    • https://cdn.shopify.com/s/files/1/0434/7304/3622/files/gomizefodevutijekezekewes.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b260.bin
7250bd4559dbc7e47d2ea6476f04ec1fd4c74d89ad07666ec8f7ea02cf23e4d3
pdf-font-stream PDF embedded font (sfnt) at offset 0xB260 5152 bytes
font_01_sfnt_off0000c3ce.bin
e56f3fa2f461ae9b43a69c927958d739d9828a65dbd32e4a37cba8afff54a849
pdf-font-stream PDF embedded font (sfnt) at offset 0xC3CE 10360 bytes
font_02_sfnt_off0000e74a.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0xE74A 4324 bytes