Malicious PDF — malware analysis report

Static analysis result for SHA-256 042ccf2e797d1482…

MALICIOUS

PDF

41.1 KB Created: 2020-08-30 19:22:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 087087259bdfedbf27e6e6d30dc8d3f4 SHA-1: 5d6d65842694a4ed0051d9184e226fcd8a4e2c78 SHA-256: 042ccf2e797d14827fae35b3b3c58803ac2dd53c7453e17a901d7ffcdec5908f
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common tactic for distributing malicious content or leading users to phishing sites. The document body, though heavily obfuscated, contains the same suspicious URL, suggesting it's the primary lure. The presence of numerous links to Shopify-hosted PDFs indicates a link farm or SEO manipulation attempt to improve the ranking of the malicious redirector.

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=switch+pro+controller+orange+light
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5995/3312/files/98889083617.pdf
    • https://cdn.shopify.com/s/files/1/0429/6212/4959/files/94640387522.pdf
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/25746328424.pdf
    • https://cdn.shopify.com/s/files/1/0435/7334/6465/files/sitopugimoridulopivejiv.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/los_angeles_freeway_map.pdf
    • https://cdn.shopify.com/s/files/1/0429/3361/6803/files/jugikezarunatakukutiwudax.pdf
    • https://cdn.shopify.com/s/files/1/0433/4954/1013/files/kupow.pdf
    • https://cdn.shopify.com/s/files/1/0464/5568/5288/files/adidas_platform_stan_smith.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5970/files/1404240487.pdf
    • https://cdn.shopify.com/s/files/1/0433/5756/9189/files/pomofibu.pdf
    • https://static.usrfiles.com/ugd/b8c837_4985129fd57a4576b36b95f300dba106.pdf
    • https://static.usrfiles.com/ugd/69695d_504251902a3b4a0fac8d3cb533549e2e.pdf
    • https://static.usrfiles.com/ugd/b8c837_c6ad5c6885594950ac3b8735acf93018.pdf
    • https://static.usrfiles.com/ugd/b8c837_da713ef5824e4835ada86ddc9f8d35a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_adda0cc154d94e6e80529c87ab3ab2b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_912e68264b6c4a408508b8b499f5425b.pdf
    • https://static.usrfiles.com/ugd/c83fdb_8443b6ee5b3a4188804922759a60ebea.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_off00006192.bin
7abc389a232fb342a271bd4332c4c9d1cea072ffb496b3343b6dd04736d635c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6192 5212 bytes
font_01_sfnt_off00007355.bin
ddbdc53ecac262e4505c26d2987382a1a4731b3013a8529cd2dbf346c347667f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7355 10496 bytes

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