Malicious PDF — malware analysis report

Static analysis result for SHA-256 d402628eafd82d84…

MALICIOUS

PDF

47.3 KB Created: 2020-09-21 21:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 80305388280cd2b8e1cfd6953f33176e SHA-1: f0b4262cdb7030194b3d423bb28596a5b27bca54 SHA-256: d402628eafd82d8435cc19b52f4fc24cf3d806e20fa4c956cf32222c78a8e002
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF as malicious. The presence of numerous links suggests an attempt to manipulate search engine results or direct users to malicious sites, potentially for phishing or malware distribution.

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.link/wix?keyword=hanzo+guide+overwatch In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7f45b66c-61ba-4f59-942f-4eebc1b98647.filesusr.com/ugd/1be480_5a469c91586a45cbbff092882a340338.pdf?index=trueIn PDF document text
    • https://12a184ed-d068-45c1-9df7-9f4824c5f589.filesusr.com/ugd/9f2514_6dc6b09797904c59aab5f52b5ec0af84.pdf?index=trueIn PDF document text
    • https://9ceef74a-1187-476d-baf4-d1ab806dcbaa.filesusr.com/ugd/3cb679_070e09c6ec0b44139f9db0a05a9e81f7.pdf?index=trueIn PDF document text
    • https://3a890b47-45d9-4be9-a9f2-d2db2c377332.filesusr.com/ugd/c638b7_baa8a357efa84da9968c808d25fda0dd.pdf?index=trueIn PDF document text
    • https://1ac36e45-1e39-47ff-8667-e2f9a3a321f8.filesusr.com/ugd/409ca8_eee570ac6a554ff69a04c6f6ab0e452b.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3205/1873/files/16602434784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9699/8048/files/18676467211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9227/9460/files/instagram_photos_with_captions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9964/4314/files/website_to_converter_online_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/6664/9750/files/asterix_obelix_indonesia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3482/9223/files/colorado_primary_election_2018_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/40152481244.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68CC 5388 bytes
SHA-256: 5c496bbbe49988872ddff94392e832be73348b4d069de5e60aeab165c45624c1
font_01_sfnt_off00007ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA4 5152 bytes
SHA-256: 753eea3ac109c59e265e60beb40b0a3b3138f1f3a77166b4c4e10f93b7eebaf2
font_02_sfnt_off00008d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D45 10260 bytes
SHA-256: a65ab87e1cdbc223ef5e58704c45e16e59f5b78db919eb590d10f11582b372f5

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