Malicious PDF — malware analysis report

Static analysis result for SHA-256 775229c1e5c6a2eb…

MALICIOUS

PDF

44.2 KB Created: 2020-08-24 22:07:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e900e690449ece1ecfc651f00329936 SHA-1: 4af36fac9e635af90ccf28a95f97c503f00cf748 SHA-256: 775229c1e5c6a2eb626f491a82884a27dc9f5e17c1dbdda631d966581dc225d4
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically a URL designed to redirect users to other sites. The document body, though heavily obfuscated, contains a URL that appears to be part of this redirection scheme. The presence of numerous external PDF links, many pointing to Shopify, suggests a link farm or content-spinning operation, likely to improve SEO for malicious content or to distribute further payloads.

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=brooklyn+99+meme+template
    • http://files.oxfordhpc.org/uploads/1/3/1/4/131454950/1272330.pdf
    • http://lawixafo.ikhlastours.co.nz/uploads/1/3/2/3/132303093/9422080.pdf
    • http://files.not4cell.com/uploads/1/3/0/8/130874655/vavorupiloje.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/rifitelekixinalus.pdf
    • https://cdn.shopify.com/s/files/1/0430/3385/4101/files/adenoma_tubulovelloso_con_displasia_de_bajo_grado.pdf
    • https://cdn.shopify.com/s/files/1/0428/6621/3031/files/bitate.pdf
    • https://cdn.shopify.com/s/files/1/0437/8217/6917/files/79461980757.pdf
    • https://cdn.shopify.com/s/files/1/0432/4117/7252/files/33669720632.pdf
    • https://cdn.shopify.com/s/files/1/0466/5009/7829/files/zmi_altar_guide_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8710/files/923229711.pdf
    • https://cdn.shopify.com/s/files/1/0432/0998/2107/files/xixivexokapakoralon.pdf
    • https://cdn.shopify.com/s/files/1/0435/6472/8483/files/zijikobukagirubiwad.pdf
    • https://cdn.shopify.com/s/files/1/0436/0775/2866/files/free_magazine_direct_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/3222/2615/files/format_of_a_report_writing_with_sample.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_off0000641a.bin
6a94fc5a2cb31a2f447f0a06dee53a3d9f986a26e8948b4ff36653abbd40a030		 pdf-font-stream PDF embedded font (sfnt) at offset 0x641A 4896 bytes
font_01_sfnt_off000074aa.bin
5a750b344fa725675863b707a165a320cd426b9a9e8d4dbc098df873b15d304b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74AA 9788 bytes
font_02_sfnt_off0000961f.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x961F 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.