Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ac6d4f920e3c317…

MALICIOUS

PDF

44.5 KB Created: 2020-08-14 19:16:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: bdaa88acf51b6aa996427651f8e7f39c SHA-1: ccde8826a4eca4b2df4ddddec096ed40209dd779 SHA-256: 9ac6d4f920e3c3170ff0df70cc002adf4e13b63b65bb36ddab5fe7e1f96aa1df
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The document body text, though heavily obfuscated, contains a URL that leads to a known malicious redirector. This suggests the document is designed to lead users to malicious content, likely 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.com/pify?keyword=dwarf+5e+guide In PDF document text
    • http://files.turtle-world.com/uploads/1/3/2/6/132695492/mijakaxibawe.pdfIn PDF document text
    • http://files.mathergallery.co.uk/uploads/1/3/0/9/130969790/pobitokunave_ladeganidosesob_lokikizog_labepuropaguro.pdfIn PDF document text
    • http://files.aeesei.com/uploads/1/3/1/4/131437249/sozazidereniva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6712/0539/files/important_quantitative_aptitude_questions_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5156/4707/files/markup_on_surface_pro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6955/5356/files/51810196917.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5790/4792/files/coordinate_plane_worksheets_7th_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9266/3702/files/42380546650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6524/4832/files/2002_chrysler_sebring_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8794/4096/files/excuse_me_boss_notification_tone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9846/4661/files/pizidilenenem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1958/3138/files/56857835897.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/49192449837.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8421/8521/files/muxogivev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1828/8284/files/45362054806.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7136 5080 bytes
SHA-256: a42c6d8eb9df852eb54238c97df51c191957daa480fc7280c2504ca39c50f92d
font_01_sfnt_off000082a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82A2 10260 bytes
SHA-256: 20235a03224ac11b7f37f5f0a50172d3a052df3b9e29705e308b34312187db1c

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