Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a17a670abf39458…

MALICIOUS

PDF

42.0 KB Created: 2020-08-30 20:18:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1df3ba53bf1e9937e8c6935eda0bd9df SHA-1: 673e5d4c3333b7516133237df9890aa9c907ff41 SHA-256: 4a17a670abf394580fcccc4c8e226cd16c7ec5cf33e0c841c61b5489710886b3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a large number of embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One of the primary links, 'https://ttraff.com/wix?keyword=busted+mugshots+new+mexico', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'busted mugshots new mexico' and the URLs, suggesting a lure to trick users into clicking the malicious link. The ML classifier strongly indicates maliciousness.

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=busted+mugshots+new+mexico
    • https://static.usrfiles.com/ugd/d162e3_7b2a490c828046f38d805fa630a3d575.pdf
    • https://static.usrfiles.com/ugd/b8c837_6ed8935f978a4a2e8e66d38e56bbc9ac.pdf
    • https://static.usrfiles.com/ugd/cf79db_bd03ad9eb7db4ebebd15be60e618b8a8.pdf
    • https://static.usrfiles.com/ugd/b8c837_d48435bfcd7b44a39adc667ed6fe7f03.pdf
    • https://static.usrfiles.com/ugd/7c3584_71a5dc6d0b3743e695c5aa1e7298187a.pdf
    • https://static.usrfiles.com/ugd/60933b_2a6fff7c494d4043b85b5b846748704b.pdf
    • https://static.usrfiles.com/ugd/b7306e_8a6c27f659d24bc1b6d4b0be4b7bec84.pdf
    • https://static.usrfiles.com/ugd/857e61_1c382a378af044908274d404c5bfabdd.pdf
    • https://cdn.shopify.com/s/files/1/0436/2380/9187/files/wubakotolegijolaxidu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1021/2518/files/calculus_definite_integral_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/4013/5575/files/caaspp_practice_test_7th_grade_math.pdf
    • https://cdn.shopify.com/s/files/1/0438/0209/9872/files/police_bharti_2019_gujarat_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0436/2895/3763/files/anscombe_s_quartet.pdf
    • https://static.usrfiles.com/ugd/08fe48_8e33bb73fb0f42fabc51282b63958a0f.pdf
    • https://static.usrfiles.com/ugd/c0fca2_24a9cdf40ec8426892f1d197ad912d4b.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000665b.bin
9151870f0c8f615c1162ae822bfc3d22b224ad06eddd015c2771fbbdf2f811d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x665B 5224 bytes
font_01_sfnt_off0000781a.bin
856b26b7b47c4bab7c05e88ba6a78abbede4e408974a7e50478b5c69bde56437
pdf-font-stream PDF embedded font (sfnt) at offset 0x781A 10284 bytes