Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ff69cafbd489bd1…

MALICIOUS

PDF

39.5 KB Created: 2020-08-30 03:22:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e9e97b89e174f814ab5dce63f07a12c SHA-1: 9480ecadaa60c28385e221ad3b3eb4960554b1f7 SHA-256: 0ff69cafbd489bd1e8341f07b8441176a7dca2621214c7ecd145b49f15c84cf1
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, one of which, 'https://ttraff.cc/wix?keyword=katy+perry+roar+download', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain references to this URL and other benign-looking PDF links, suggesting a link farm or redirection tactic. The ML classifier strongly indicates maliciousness, supporting the conclusion that this PDF is designed to redirect users to harmful 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.cc/wix?keyword=katy+perry+roar+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_81d893d104914a2687a9c730930d7f40.pdf
    • https://static.usrfiles.com/ugd/724fb5_f12f98f587c34f8aa5891b2a77087301.pdf
    • https://static.usrfiles.com/ugd/76de1a_60db8d6965c44966b6eaf645393a60b7.pdf
    • https://cdn.shopify.com/s/files/1/0433/8922/3066/files/zular.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3670/files/fupijigorirab.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_9c7972350cf34514b8b5971e0bdd2460.pdf
    • https://static.usrfiles.com/ugd/eb4c03_2545d255e4ff43778344c8fbfb4a243b.pdf
    • https://static.usrfiles.com/ugd/b8c837_b242389106a3442281a92cbf8ce93eb3.pdf
    • https://static.usrfiles.com/ugd/d54300_b30cb0daf7b74c2780278a90de072d0a.pdf
    • https://static.usrfiles.com/ugd/b8c837_4b8b50b6c65d44b3a894d9dbbbea10e3.pdf
    • https://cdn.shopify.com/s/files/1/0457/5975/8492/files/marvel_comics_1_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0432/5107/3174/files/tumuxuwajenosafize.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6178/files/3d_archive_lamp_model_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/jififodipod.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_off00004e59.bin
3bdbd31ccc3fd7be16a18aba02997b516e19030a6fb84608e0ab22f463c8aaac
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E59 4936 bytes
font_01_sfnt_off00005f4f.bin
b95d0162d1168fd13f2c0db6347f445a8895918e5763c7adbd97a9c96c0b530e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4F 15364 bytes