Malicious PDF — malware analysis report

Static analysis result for SHA-256 93bbf135a2c9745d…

MALICIOUS

PDF

44.9 KB Created: 2020-09-02 16:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb5882b5bbdff847cf1242c902e1d05a SHA-1: 9c0cc73aa9a2449e4254fafe9de622b2ba8c3305 SHA-256: 93bbf135a2c9745d51d6430d7339183bbd3aca7f6e173feac46c23ea9d9e8dcc
152 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a link farm designed to redirect users. The primary redirector URL is https://ttraff.club/wix?keyword=druid+classic+talent+tree+guide, which is flagged as malicious. The document body, though heavily obfuscated, contains this URL and references to other PDF files, suggesting a lure to disguise the malicious redirection. The ML classifier strongly supports the malicious verdict.

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.club/wix?keyword=druid+classic+talent+tree+guide
    • https://static.usrfiles.com/ugd/b8c837_ef3a5826b81447a38677df76b31ebf58.pdf
    • https://static.usrfiles.com/ugd/c068f8_7ecd0f495a85414788c821dfe0e7f315.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a9c41132ada4ed8a25eb7fa1c4e5b61.pdf
    • https://static.usrfiles.com/ugd/e745be_c58d59521d6d4631800c5276ced3d2a1.pdf
    • https://static.usrfiles.com/ugd/b916f4_a15ea5a68ee74e1cad167f86880f1ad3.pdf
    • https://static.usrfiles.com/ugd/24853a_22d38cbad8bd42f495a31b7936ff0f22.pdf
    • https://cdn.shopify.com/s/files/1/0430/9952/1185/files/hootoo_tripmate_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/9779/2420/files/pofazori.pdf
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/79020815235.pdf
    • https://cdn.shopify.com/s/files/1/0437/4387/1128/files/76913627812.pdf
    • https://cdn.shopify.com/s/files/1/0444/4015/8374/files/cartoon_stories_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/38242082308.pdf
    • https://cdn.shopify.com/s/files/1/0441/2293/1352/files/seismic_data_analysis_yilmaz_free.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_off0000724a.bin
e7cd31a928a5e5810937054deb03cf3390653a242ddece783b3c31ddb132c47e
pdf-font-stream PDF embedded font (sfnt) at offset 0x724A 5104 bytes
font_01_sfnt_off000083b7.bin
8320fac0034ccab90c0bff598a0c18bfa20f3d4f2c0371ec61530505dac1eaf2
pdf-font-stream PDF embedded font (sfnt) at offset 0x83B7 10244 bytes