Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b0522d8e855417d…

MALICIOUS

PDF

57.4 KB Created: 2020-08-30 03:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17595ff0788730010657a5a657c0a377 SHA-1: a0147b504d9ed607f1cd89c60cf54fcde7bb0cda SHA-256: 6b0522d8e855417d843ac00b769f232deff7919fbcb2cff35b81cb34f3761cc4
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, which is likely intended to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains the URL and keywords that suggest a lure. The presence of numerous external PDF links also indicates a link farm, potentially for SEO manipulation or to host further malicious content.

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=wu+tang+clan+a+better+tomorrow+album
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/a382ee_75380ac191e5449b8b17c5b9ccfd17e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_ceb5fd6219bb4f58a28047c1bbfcf87a.pdf
    • https://static.usrfiles.com/ugd/fa6f14_f4f01d38e58e48c0812fe685fb5d961d.pdf
    • https://static.usrfiles.com/ugd/e2c250_ecef25c9b81e4880b65053109241310e.pdf
    • https://static.usrfiles.com/ugd/097bd5_2aa0ee14c39642ad8a3da097f32fd034.pdf
    • https://cdn.shopify.com/s/files/1/0431/5057/3724/files/acls_provider_manual_2016.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/biblia_romana.pdf
    • https://cdn.shopify.com/s/files/1/0437/5520/8858/files/83797292718.pdf
    • https://cdn.shopify.com/s/files/1/0432/6244/3683/files/a_b_c_book.pdf
    • https://cdn.shopify.com/s/files/1/0464/9408/9384/files/american_truck_simulator_1._35_full.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0810/files/band_of_brothers_ambrose.pdf
    • https://cdn.shopify.com/s/files/1/0431/7403/5607/files/99502745730.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1781/files/lejeloroxulidugezomiw.pdf
    • https://cdn.shopify.com/s/files/1/0435/6158/2741/files/grim_dawn_health_bars.pdf
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/kijopimofoxa.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_off00009f4f.bin
1a552907f779ad6451eee6beff10e4bc450a382f6a11a67cf99ecbfef9ce0c8b
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F4F 5188 bytes
font_01_sfnt_off0000b0f1.bin
8c307d00317d8c8af9734ffacc20494153b682a056931214218c9a93d2946059
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F1 12288 bytes