Malicious PDF — malware analysis report

Static analysis result for SHA-256 734ddd02fe5efa49…

MALICIOUS

PDF

49.9 KB Created: 2020-08-30 04:19:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f3abba2fa753ab78ea06cc7c74ed1d1 SHA-1: 7ce857a6f5e8c64450a4a09329a063224366ed65 SHA-256: 734ddd02fe5efa4909b9f15a24c0456955a15aaaa56d1565a9986d25c568f479
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Farberware air fryer oven recipe boo' and includes the malicious URL, suggesting a lure for SEO spam or phishing. The presence of many external PDF links further supports the SEO spam hypothesis.

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.ru/wix?keyword=farberware+air+fryer+oven+recipe+boo
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_f7899db766d849b7911342b2a34b52c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e95c97eab8c4b959e761f0896d246b4.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a36d9949354433ca8684a5763695c9d.pdf
    • https://cdn.shopify.com/s/files/1/0428/8934/7228/files/cts_exam_guide_second_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/8565/1358/files/votasawuzusepimi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9418/7933/files/wusena.pdf
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/jamojujowedumekezekupis.pdf
    • https://cdn.shopify.com/s/files/1/0438/2975/6064/files/ledanuvukemelovotikow.pdf
    • https://static.usrfiles.com/ugd/b8c837_599afe2b12ba49d3ba0b8e49a29c1674.pdf
    • https://static.usrfiles.com/ugd/b8c837_b11d34bfef5b4b889ad007d69733c5ae.pdf
    • https://static.usrfiles.com/ugd/3e9e83_0d5ed112050f4bfe94409b31b2bd6f61.pdf
    • https://static.usrfiles.com/ugd/f96b02_f11f9cd169064e7893441d7fb6e8c6b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b94b05d034940d8877c2d6facf28444.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1776/files/oxford_english_grammar_course_advanced_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/3861/2378/files/dimazulebaxutep.pdf
    • https://cdn.shopify.com/s/files/1/0457/5831/6700/files/ascend_performance_materials_careers.pdf
    • https://cdn.shopify.com/s/files/1/0432/6840/7464/files/adjectives_worksheets_ks2.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000780d.bin
ba79ae7748c47176c7d256ffe1642cb8185199f98cb15e447de14355f397c0e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x780D 4856 bytes
font_01_sfnt_off000088af.bin
a92942b1b06b7bc9596318c24e711e7b9d40a0121bcaf07782f13cc5dcdbc835		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88AF 10692 bytes
font_02_sfnt_off0000ac47.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC47 4324 bytes

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