Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba88e29de3592b60…

MALICIOUS

PDF

40.7 KB Created: 2020-08-25 01:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b8e674ad504da8fa3a6252e7b90445a SHA-1: 013e7d69d6ebd2fa4bda92364533cac17ca83900 SHA-256: ba88e29de3592b605086fece90a2f71dc5d6bf090881e57f02f9fcda551ce1a3
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a resource for 'free tv apps for android'. This redirector likely leads to a malicious payload or phishing site. The document also contains a large number of links to various PDF files hosted on Shopify, suggesting a link farm or SEO poisoning tactic to improve search engine ranking for malicious content. No scripts were extracted, but the presence of the malicious redirector and the link farm strongly indicate a phishing or malware distribution attempt.

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.cc/pify?keyword=free+tv+apps+for+android
    • http://files.alamoheightschoir.com/uploads/1/3/2/6/132696414/wogixus.pdf
    • http://gokof.myvitalessentials.com/uploads/1/3/1/8/131872155/migizujime-texavizeda-jiteditediparu.pdf
    • http://files.rosesandcloversboutique.com/uploads/1/3/2/7/132740377/f0c71eb5a.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4248/files/bible_translation_comparison_chart.pdf
    • https://cdn.shopify.com/s/files/1/0435/4070/9527/files/islamic_calendar_2020_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/4848/5535/files/munikuxu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6580/files/book_acknowledgement_sample.pdf
    • https://cdn.shopify.com/s/files/1/0431/4244/7253/files/kolanoki.pdf
    • https://cdn.shopify.com/s/files/1/0437/5825/6286/files/pujuraxiz.pdf
    • https://cdn.shopify.com/s/files/1/0437/7467/3050/files/samefonivovozubazab.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93236297381.pdf
    • https://cdn.shopify.com/s/files/1/0430/1350/5185/files/47920451131.pdf
    • https://cdn.shopify.com/s/files/1/0435/4909/8148/files/jobokajenesojopolubijet.pdf
    • https://cdn.shopify.com/s/files/1/0428/0687/0183/files/kozelesukoxajoviwudux.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_off000061ae.bin
7583bfe47b1f834ac6c103ed54914daa7d4ca85dc344690b20235cb33b874092
pdf-font-stream PDF embedded font (sfnt) at offset 0x61AE 5016 bytes
font_01_sfnt_off000072d5.bin
9ea5438bc237705bbe147028778477c88054554aa34a4870378b2457149127be
pdf-font-stream PDF embedded font (sfnt) at offset 0x72D5 10364 bytes