Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d70adb82c6d9c04…

MALICIOUS

PDF

42.3 KB Created: 2020-08-08 18:43:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acd5361842b1dd1fd5c58c7e403edba3 SHA-1: 35c0eb5cbbd8663f3abe0d47d9c4b7e4308c1dcb SHA-256: 8d70adb82c6d9c046dce62d46da30b33da8e171afb7fbb3453652725f631e7a6
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'celebrity endorsement articles pdf' and the malicious URL 'https://ttraff.ru/pify?keyword=celebrity+endorsement+articles+pdf'. This suggests the document is designed to trick users into clicking the link, likely leading to a phishing site or malware download. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=celebrity+endorsement+articles+pdf
    • http://tonode.bonnieblueflag2124.org/uploads/1/3/1/4/131453541/67c258d2b9908.pdf
    • http://files.bliss-out.co/uploads/1/3/1/3/131398362/9766958.pdf
    • http://files.liviajatoba.com/uploads/1/3/0/7/130739369/mitetavuluru.pdf
    • http://files.theberchmansinitiative.org/uploads/1/3/1/4/131437839/wodekijidabofe-toxupekuvi-divova.pdf
    • http://files.kodalylevelsseattle.com/uploads/1/3/2/6/132682787/8965373.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/fixozefunemibomenexizesu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9531/7911/files/20941904506.pdf
    • https://cdn.shopify.com/s/files/1/0435/1305/3338/files/manual_weed_wacker.pdf
    • https://cdn.shopify.com/s/files/1/0436/4537/0528/files/12045938301.pdf
    • https://cdn.shopify.com/s/files/1/0433/8640/5022/files/periodic_table_download_file.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/9952590628.pdf
    • https://cdn.shopify.com/s/files/1/0437/6775/8999/files/mowigupidefovafuminu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9386/8187/files/telugu_songs_download_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0434/9224/5666/files/9820649866.pdf
    • https://cdn.shopify.com/s/files/1/0433/7411/7015/files/zitezevawopixujibajepora.pdf
    • https://cdn.shopify.com/s/files/1/0431/1485/6610/files/literary_criticism_an_introduction_to_theory_and_practice_bressler.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1223/files/ti-_30xa_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/6635/0998/files/14224696196.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_off000066a0.bin
86dd57b5c3b2bff08b9524b277c10558cadb72bd64cc47f6ad4f51e7020752ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x66A0 5448 bytes
font_01_sfnt_off0000790c.bin
43db9dbe1cce448bad117cfb99ac062124b167d5b6da45f57aceffda11b4b5ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x790C 10100 bytes