Malicious PDF — malware analysis report

Static analysis result for SHA-256 43f337423d777c81…

MALICIOUS

PDF

58.8 KB Created: 2020-08-11 04:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1966aa77038a80cf416a6e57e4fdd003 SHA-1: 0120350696372d17682c99eca96875615da4165c SHA-256: 43f337423d777c81e926cd056eff0333badd0871831b9b6927173d1bbc1a2fa2
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to redirector infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though partially corrupted, contains text and URLs suggesting a lure related to 'benzodiacepinas' and a large number of other PDF links, indicating a link farm. The primary malicious URL identified is https://ttraff.cc/pify?keyword=articulo+de+benzodiacepinas+pdf, which is likely used to redirect users to a malicious site.

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.cc/pify?keyword=articulo+de+benzodiacepinas+pdf In PDF document text
    • http://fekejow.fortis-fp.com/uploads/1/3/1/3/131380600/2624098.pdfIn PDF document text
    • http://files.clairebeynon.com/uploads/1/3/2/8/132814272/volida.pdfIn PDF document text
    • http://nuvus.wardavepresby.org/uploads/1/3/1/1/131163635/15f8d8b54f93.pdfIn PDF document text
    • http://files.lightenupwithliz.com/uploads/1/3/1/4/131483098/4cc41b189ebf5d.pdfIn PDF document text
    • http://files.deanocraft.com/uploads/1/3/0/9/130970016/e20c9be.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
    • https://cdn.shopify.com/s/files/1/0428/5035/3318/files/45085019878.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7196/2269/files/alembic_pharma_products_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1583/0695/files/lujirelitif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1044/8798/files/54418557855.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4016/2460/files/static_banking_awareness_capsule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/7258816103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9538/3446/files/ghostscript_merge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/gc_160_carburetor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/3502/8630/files/dagirip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zosakasebiribo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E35 5208 bytes
SHA-256: a60c42cc958dcf54733d71dc4493d1337a2e838295231cbcd5da451850681744
font_01_sfnt_off00008fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FED 12548 bytes
SHA-256: d426f7bd314df7348bdaf9b76dfd8a4fea70c74a99a0300d1ca816c8b4983455
font_02_sfnt_off0000b7ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7EE 16356 bytes
SHA-256: f22d8fd9533caa61c6a2d307bb69cf86343a2ada2e779b71f3de02dd673fb1b6
font_03_sfnt_off0000cdc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC6 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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