Malicious PDF — malware analysis report

Static analysis result for SHA-256 45760c0b32a75f52…

MALICIOUS

PDF

45.3 KB Created: 2020-09-19 13:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a9f57ffdb4ffd2a5f4c95366c358555f SHA-1: 6365487158356037c82cc0646c905852e6b85e06 SHA-256: 45760c0b32a75f528a5ae75b7ba712c3d0e30402ac701f7399f0b9213ca9692c
154 Risk Score

Malware Insights

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

This PDF document contains a link farm, with one primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL and other benign-looking URLs, likely to mask the malicious intent. The ML classifier strongly indicated maliciousness, supporting the heuristic findings.

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.link/wix?keyword=animal+crossing+pocket+camp+gulliver+update In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/65017413201.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3605/5454/files/dfas_in_manual_37_100.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1913/1285/files/podupa.pdfIn PDF document text
    • https://3265828a-d014-4e39-9542-a4f50c512da1.filesusr.com/ugd/735189_878bb4b7a66f49ec936b10e54b5c1ca6.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8462/7616/files/manititag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9068/2783/files/beautiful_baby_boy_pics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2388/2645/files/womufudetuluketebesekoniw.pdfIn PDF document text
    • https://a2fcdd1c-3a0d-4160-9769-a009cff4f4d2.filesusr.com/ugd/fc840b_0b8a10c808f248baa00597b35ab4f13b.pdf?index=trueIn PDF document text
    • https://b5a9fcd9-2722-4293-9f7c-a894e584fcc6.filesusr.com/ugd/dad7b5_a23580c1d8754e2789fd04c3d8797dcf.pdf?index=trueIn PDF document text
    • https://a4fb7a5c-bbb5-43a5-aa06-f1f0b9b6fe16.filesusr.com/ugd/d4579c_c413140fb1e24f258e13399c3692cc66.pdf?index=trueIn PDF document text
    • https://e07b779d-4655-4dc4-9c41-c6525b783235.filesusr.com/ugd/15cd4d_a9b757ee1e5f4d12b69b581eda23e113.pdf?index=trueIn PDF document text
    • https://cea58f86-8030-4cbf-82b5-fafc6d4dbb7e.filesusr.com/ugd/d5cf39_eb0dc3eebb194a38add21cae4ea6216f.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D78 5504 bytes
SHA-256: 11a4491592589794e93b601cf3b2d5229c85f19fcc402ba84fbb33cc3667fd1f
font_01_sfnt_off0000701c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x701C 10196 bytes
SHA-256: e9c1881351f7dd75f8a8bfe1714d5e274603d8ba13c2c218ad76e09429437515
font_02_sfnt_off00009333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9333 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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