Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca68a73d747434d…

MALICIOUS

PDF

42.0 KB Created: 2020-08-31 23:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71159df176e9806b38bdfd6d639f8f2a SHA-1: 790e3f68761347aa4e7e0ed4b475146395d8f6cf SHA-256: 0ca68a73d747434d3a4588d5a856104a01dca4f29a6362ed5f7bbf18885ee618
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at `https://ttraff.cc/wix?keyword=toy+defense+3+mod+apk+data`, which is likely the primary malicious payload delivery mechanism. No scripts were extracted, but the presence of numerous links and the malicious redirector indicate a phishing or malware distribution attempt.

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=toy+defense+3+mod+apk+data
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0457/8276/1628/files/75793376209.pdf
    • https://cdn.shopify.com/s/files/1/0434/6645/7254/files/84117314080.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1522/files/goxofesupikaxa.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_c51e3e66e7be4316b952fd7bea2705ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b7fd98a56984821900bff5466b75b4a.pdf
    • https://static.usrfiles.com/ugd/b8c837_eeeec7059f2c46c69f5ad0e5a6696a2e.pdf
    • https://static.usrfiles.com/ugd/b8c837_cf53d8e365f34b8cb2a280aba733265a.pdf
    • https://cdn.shopify.com/s/files/1/0431/5326/0700/files/background_vector_free_yellow.pdf
    • https://cdn.shopify.com/s/files/1/0436/4576/3744/files/xarapawebaloganu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4334/6839/files/xenefewawa.pdf
    • https://cdn.shopify.com/s/files/1/0429/4157/9420/files/422345458.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/wudelabimewekebawokarivi.pdf
    • https://cdn.shopify.com/s/files/1/0463/1763/3698/files/realidades_2_capitulo_1a_test_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/0577/1939/files/60962618532.pdf
    • https://cdn.shopify.com/s/files/1/0436/0873/5907/files/regrouper_plusieurs_mac.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_off000065e4.bin
3cebe410c545a8415de12a471092cc52dfd08533c1f7b01b1288904633961353		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65E4 5336 bytes
font_01_sfnt_off0000780e.bin
5b1a8d795de2bdd5afddae919ca6189416785d6a426e20c7d3acd35043f23389		 pdf-font-stream PDF embedded font (sfnt) at offset 0x780E 10240 bytes

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