Malicious PDF — malware analysis report

Static analysis result for SHA-256 869265a24679e5bf…

MALICIOUS

PDF

48.5 KB Created: 2020-08-31 14:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5258046281d29d608fa28dcc14f4ca6 SHA-1: 5f3002045abd5d4d538c483a6dd2a881fb63f4fd SHA-256: 869265a24679e5bf8660303dbe31d5ca0da5cc41cccfc55b83d167be5412b5a4
152 Risk Score

Malware Insights

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

This PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.com/wix?keyword=adjective+clauses+worksheets+with+answers, which is likely intended to lure users to a malicious site. The presence of numerous other links to shopify.com, while individually benign, contributes to a link farm pattern, suggesting an attempt to manipulate search engine results or distribute malicious content.

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=adjective+clauses+worksheets+with+answers
    • https://cdn.shopify.com/s/files/1/0432/6657/2441/files/11887921186.pdf
    • https://cdn.shopify.com/s/files/1/0431/5385/0524/files/crack_serial_number_abbyy_transformer_3._0.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/ninoxinovivuxilek.pdf
    • https://cdn.shopify.com/s/files/1/0429/5426/0643/files/88136004092.pdf
    • https://cdn.shopify.com/s/files/1/0440/0473/7174/files/14300555732.pdf
    • https://cdn.shopify.com/s/files/1/0427/9438/5575/files/90459547160.pdf
    • https://cdn.shopify.com/s/files/1/0432/7473/1685/files/kundalini_yoga_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/1059/6775/files/64224026695.pdf
    • https://cdn.shopify.com/s/files/1/0431/7098/8188/files/1931864635.pdf
    • https://cdn.shopify.com/s/files/1/0431/3179/7668/files/zibineze.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58097506778.pdf
    • https://static.usrfiles.com/ugd/b8c837_131aae11a9d54ad39cb1a4ef21c1cdca.pdf
    • https://static.usrfiles.com/ugd/3bca44_6185d75c1fa845fbbc9f077bb862835b.pdf
    • https://static.usrfiles.com/ugd/b8c837_a36ea42998094656aa0a9fa596767647.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076a1.bin
dd7b880f1c6958317b71933e3175eb4154b1281d355b69180e4ce829e506ee21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76A1 2828 bytes
font_01_sfnt_off0000809b.bin
8795e05926c6870bacf233567c50c6746dc0461c3dd857d073ae084114bba563		 pdf-font-stream PDF embedded font (sfnt) at offset 0x809B 5308 bytes
font_02_sfnt_off000092b7.bin
1071c0021696b2d4eee7aef680f56f5371d0d37150976ca463132a3f6a2928e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92B7 9932 bytes

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