Malicious PDF — malware analysis report

Static analysis result for SHA-256 28b166ce19332535…

MALICIOUS

PDF

43.4 KB Created: 2020-09-01 00:29:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 295592170ef4afc3ac1bfe4715d7bc27 SHA-1: 807fd607d4ead9b7b625a24f7c028159c075f416 SHA-256: 28b166ce19332535993fff4375e9c01a304e28ff0018e0a34070b7bb78aa4f2e
154 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=breeam+uk+new+construction+2018+manual'. This URL is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, also contains this URL, reinforcing its role as a lure. The presence of numerous other links to Shopify and static hosting sites suggests a link farm or content distribution network used to host potentially malicious files.

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/wix?keyword=breeam+uk+new+construction+2018+manual
    • https://cdn.shopify.com/s/files/1/0434/6295/1065/files/79502062531.pdf
    • https://cdn.shopify.com/s/files/1/0433/0727/0297/files/varedenarafipikinotimobuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/2482/6014/files/42120424150.pdf
    • https://cdn.shopify.com/s/files/1/0441/3105/7816/files/loan_calculator_apps_free.pdf
    • https://static.usrfiles.com/ugd/538d67_c2329825fb2943028a0199737c244fca.pdf
    • https://static.usrfiles.com/ugd/850f07_75f53c9584614596a17e189bbb24a5b0.pdf
    • https://static.usrfiles.com/ugd/166c09_4d7b5ec72e1c470a9403e804c538827c.pdf
    • https://static.usrfiles.com/ugd/b8c837_f451828e6a5e4f59b1a49fcadbce9e02.pdf
    • https://static.usrfiles.com/ugd/b8c837_26450e6b92e34791a8b4ded296ad509b.pdf
    • https://cdn.shopify.com/s/files/1/0431/6941/5327/files/video_converter_android_full_version_apk.pdf
    • https://cdn.shopify.com/s/files/1/0439/0925/1227/files/60135639810.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/68945608145.pdf
    • https://cdn.shopify.com/s/files/1/0437/9262/9917/files/remove_duplicates_from_different_sheets_excel.pdf
    • https://cdn.shopify.com/s/files/1/0438/3404/8669/files/tolaxiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2832/4257/files/wuzebodezitijagobedimeb.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_off000068e9.bin
c64da9431217a130779f26d381bde2c026dd6e475e61abc9a9fcd9cde191deb2
pdf-font-stream PDF embedded font (sfnt) at offset 0x68E9 5672 bytes
font_01_sfnt_off00007c34.bin
c7022cc70378fc0431cceb240cd135bda0c0a51d1bf170aa26c2feb12d71b93a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C34 10900 bytes