Malicious PDF — malware analysis report

Static analysis result for SHA-256 6def74cb66f04eea…

MALICIOUS

PDF

60.8 KB Created: 2020-08-04 19:36:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e27e74284e5c34bae63838d1e70336f SHA-1: fd1fefbd66f5e652142e98f06886e74471f48a10 SHA-256: 6def74cb66f04eead1a192d0fb15eb55a5b668edb16170339945043799c52604
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a strong attempt to direct users to malicious infrastructure. The ML classifier also flagged this PDF with high confidence, suggesting malicious intent.

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=eudralex+volume+4+annex+15+pdf
    • http://files.jnrbuilding.com/uploads/1/3/1/4/131407178/bezekezel_tazamaximul_paxibip_nadog.pdf
    • http://files.mysanelife.com/uploads/1/3/0/9/130969993/3309755.pdf
    • http://files.kennyfedorko.com/uploads/1/3/1/4/131406885/fugipimu.pdf
    • http://files.goldenreiki.co.nz/uploads/1/3/2/7/132741155/36d813.pdf
    • http://files.suviperformance.com/uploads/1/3/0/7/130775373/7497118.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/7220/0605/files/sojirosoleneneva.pdf
    • https://cdn.shopify.com/s/files/1/0434/7048/7712/files/analytical_and_synthetic_method_of_teaching_mathematics.pdf
    • https://cdn.shopify.com/s/files/1/0434/0698/3318/files/55597456088.pdf
    • https://cdn.shopify.com/s/files/1/0432/6418/0390/files/16258361499.pdf
    • https://cdn.shopify.com/s/files/1/0428/6965/3663/files/kutokikerenilo.pdf
    • https://cdn.shopify.com/s/files/1/0437/2017/9864/files/defopuvidegetegaxofago.pdf
    • https://cdn.shopify.com/s/files/1/0435/5126/0823/files/godenodegeku.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/skyrim_special_edition_sex_mods.pdf
    • https://cdn.shopify.com/s/files/1/0434/6304/9378/files/the_first_48_season_16.pdf
    • https://cdn.shopify.com/s/files/1/0434/5993/6421/files/57115082554.pdf
    • https://cdn.shopify.com/s/files/1/0434/1248/8348/files/biomass_energy_resources.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3250/files/wuxit.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008df4.bin
b155f6453ddd318483f1630060d7a3dc4f80f7e885a59acc0d6cfe3f3276a9c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF4 5112 bytes
font_01_sfnt_off00009f4a.bin
819121b490f6ba6974b26a16cd1d17ece523032903ce83414d9b53447094bae0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F4A 10124 bytes
font_02_sfnt_off0000c1f5.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1F5 16204 bytes
font_03_sfnt_off0000d725.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD725 4324 bytes

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