Malicious PDF — malware analysis report

Static analysis result for SHA-256 77b62a2d5273ee17…

MALICIOUS

PDF

39.2 KB Created: 2020-09-02 01:28:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bded68a1670a5b91e66b1a6dbcb081a SHA-1: 80639cdbed1814b97cdca491b9aac89ee5a51363 SHA-256: 77b62a2d5273ee17b404ff985103002d12b58b2d700d35a5ea9200f295e8e9cf
154 Risk Score

Malware Insights

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

This PDF document contains a link to a malicious redirector, ttraff.com, which is likely used to host further malicious content or phishing pages. The document also features a large number of links to other PDFs hosted on Shopify, suggesting an attempt to manipulate search engine results or create a link farm. The ML classifier strongly indicates malicious intent.

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=william+shakespeare+sonnet+130+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1479/1068/files/android_tv_box_app_for_movies.pdf
    • https://cdn.shopify.com/s/files/1/0433/3892/4181/files/24624993170.pdf
    • https://cdn.shopify.com/s/files/1/0434/4319/1960/files/figubudolaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/phonics_three_letter_words.pdf
    • https://cdn.shopify.com/s/files/1/0430/5502/2234/files/contending_theories_of_international_relations_a_comprehensive_survey_free.pdf
    • https://static.usrfiles.com/ugd/07625c_d95910c2798444acb70dc41b9713657b.pdf
    • https://static.usrfiles.com/ugd/5af86b_39fa31dc2e654fcf9f2c7407f2327cec.pdf
    • https://cdn.shopify.com/s/files/1/0432/4353/6541/files/nazapaxixufufurokowiwir.pdf
    • https://cdn.shopify.com/s/files/1/0429/0609/1673/files/27760077973.pdf
    • https://cdn.shopify.com/s/files/1/0428/6775/3116/files/83431095057.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/87822137229.pdf
    • https://cdn.shopify.com/s/files/1/0432/2328/5920/files/gefenoxexiris.pdf
    • https://static.usrfiles.com/ugd/f2ef67_bbafc4372b0a4a3e9dd0c24470b28f55.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_b8ea86631f214acc99881cd823425a82.pdf
    • https://static.usrfiles.com/ugd/b8c837_7fa446c470eb4569818538220fc8a54d.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ad3.bin
341f464082571dbed5d6c19d52b30349500b32a05884d561f2aaadccc76721b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD3 5716 bytes
font_01_sfnt_off00006e39.bin
113752733424651382d367e4663cf614efe21f83506cb5c1811fc1e7b7d8689a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E39 9844 bytes