Malicious PDF — malware analysis report

Static analysis result for SHA-256 60acfe6879ff4ec2…

MALICIOUS

PDF

39.5 KB Created: 2020-09-05 08:19:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5777b7071ce311188b900c56c17b44ea SHA-1: 36f950dc9ccb4706135c97121d5e6cd3b2992276 SHA-256: 60acfe6879ff4ec22993fc267dac9a6a055e6114ff52314c74f307714637c14b
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a movie download, which redirects to a known malicious infrastructure. The document body, though heavily obfuscated, contains the same malicious URL. The presence of numerous other PDF links, many pointing to Shopify, suggests a link farm or SEO poisoning tactic to increase visibility of the malicious URL. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=bazaar+kannada+movie++in+hd In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9586/8067/files/95773287463.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6077/2515/files/an_inspector_calls_revision_pack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5201/4491/files/dedeparivewilelum.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/575fb0_548075265beb4e12bc176fe2e13e1b73.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3286/0056/files/51179766231.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1806/6843/files/sumutosagevidugopufez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6249/1286/files/18711769360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2589/9426/files/honda_xr2600_engine_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9860/9566/files/34560908348.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8770/7804/files/aristophanes_assemblywomen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/xusoboweg.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_off00005124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5124 4784 bytes
SHA-256: 7bc37e9a9825d5e090f10a9ad14a966a5cbce485e6fa2faafabecf19c56468fc
font_01_sfnt_off00006133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6133 10052 bytes
SHA-256: 37cad9bd59dce98b3255ef440154fab36175f72afa34794e6257890a7d58013e
font_02_sfnt_off00008370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8370 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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