Malicious PDF — malware analysis report

Static analysis result for SHA-256 1db4cf68604bde98…

MALICIOUS

PDF

62.0 KB Created: 2020-08-25 17:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5f51ee122193665573d6cd47bdd715b4 SHA-1: a676e7514f2ade5ab4c9023a99d3434138263d3e SHA-256: 1db4cf68604bde98cc8db8de4eafa9d6e1c211ace4441dc09e6e63ff4b49ca7b
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting a lure for 'Ableton full version', aligning with the redirector's keyword. The presence of many external links, including a 'link farm', indicates an attempt to distribute malicious content or SEO manipulation.

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/pify?keyword=ableton++full+version In PDF document text
    • http://files.mountainmaterials.net/uploads/1/3/2/6/132682335/7105053.pdfIn PDF document text
    • http://files.pbl1983.com/uploads/1/3/0/7/130738701/7808084.pdfIn PDF document text
    • http://files.stjohn23rdministryofpresence.org/uploads/1/3/0/7/130739202/tufawidorekul.pdfIn 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
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5939/6254/files/nunirisofera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/4006/6971/files/antecedentes_de_la_contabilidad_gubernamental_en_mexico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/8224160890.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8784/6806/files/sojupedoboloxukorivem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7727/8623/files/bdo_sorceress_skill_build.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/0354/6533/files/tratamiento_acretismo_placentario.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/7084/0981/files/fubupizojepugidov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7706/6135/files/gta_5_strategy_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6317/1485/files/creation_kit_fallout_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/32288684725.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/operational_vs_tactical_vs_strategic_reporting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/fazifofurorod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6124/7129/files/25109835957.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00009f1c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9F1C 23824 bytes
SHA-256: f1ebd8790491a3786b3832d7891b78229c3ff0bb5493c5014448bb193ffc4b9e
font_00_sfnt_off00006c11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C11 4620 bytes
SHA-256: 4cf67aadce24b6f207a54f7d12ed274be9b73de42129c495f75c8a1d980ff340
font_01_sfnt_off00007bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BDC 10312 bytes
SHA-256: 0822086befc8d75260c59759ab53b615a87e449dc46df5977bca77bfc8b06ab3
font_03_sfnt_off0000c813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC813 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
font_04_sfnt_off0000d613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD613 4876 bytes
SHA-256: 5e4037a961c5c9e8593e3eb5e4708563601da80ebdebee4145286dac41af1432

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