Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b80ac82e1c76592…

MALICIOUS

PDF

40.2 KB Created: 2020-08-30 04:51:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cca6336552bbb2f7cda21170130eeee9 SHA-1: 60d3588703b1c0d22643fe12c6331ae72706ba58 SHA-256: 2b80ac82e1c76592c247d14a57e8a89b276639857d030a4e2ee32b5fde2d3428
152 Risk Score

Malware Insights

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

The PDF document contains a lure related to a gaming chair manual, which includes a link to a known malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and the PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which point to benign Shopify URLs but are likely part of a link farm to improve search engine ranking for malicious content. No scripts were extracted from this sample.

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.ru/wix?keyword=x+rocker+phantom+gaming+chair+manual
    • https://cdn.shopify.com/s/files/1/0431/8347/2802/files/tolivoruxojuse.pdf
    • https://cdn.shopify.com/s/files/1/0437/8794/4096/files/51758964959.pdf
    • https://cdn.shopify.com/s/files/1/0428/6119/9526/files/74580205619.pdf
    • https://static.usrfiles.com/ugd/d3758e_e006e6664d0a4ed9b1ce8e6a0b19d3b2.pdf
    • https://static.usrfiles.com/ugd/e42ee3_a9e3a340f97a49efa1b2230cc78c921b.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9269d17b71a4edd87cb2a3594e3f91f.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea6993ee717a4ae3825905e4c241461b.pdf
    • https://static.usrfiles.com/ugd/b8c837_736f5ea4b2b1488188eed9c4b98ec757.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_1f1aad9a14624b6ca413fb46da1ceb2b.pdf
    • https://static.usrfiles.com/ugd/097bd5_db47bf33cddb4436a0532854b4a829df.pdf
    • https://static.usrfiles.com/ugd/097bd5_18a0681448904058b753dd758f986c6d.pdf
    • https://static.usrfiles.com/ugd/b8c837_d3659f6c8af5494d98e1f132c61d95db.pdf
    • https://cdn.shopify.com/s/files/1/0430/3277/2757/files/lexex.pdf
    • https://cdn.shopify.com/s/files/1/0438/7697/4747/files/canon_700d_specifications.pdf
    • https://cdn.shopify.com/s/files/1/0430/7399/4905/files/82852514516.pdf
    • https://cdn.shopify.com/s/files/1/0440/8557/5832/files/4263420215.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_off00005f5d.bin
3b37d4e62ae4e8b86ab74de1ad2fd2090a4a742eae35ca1f970424d66565a020
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5D 5208 bytes
font_01_sfnt_off000070e0.bin
ce10852efda582f840fc61545d9d000b0d7f40912ea9666d85dba993d42cba4e
pdf-font-stream PDF embedded font (sfnt) at offset 0x70E0 10188 bytes