Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd956f43e25d751f…

MALICIOUS

PDF

44.1 KB Created: 2020-08-13 06:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d24f9c03c5b5a8514b987418b9f6f180 SHA-1: 7cbbf96b531e975cae501c2b7c89e6b3e3ef9ae9 SHA-256: dd956f43e25d751f5f1c3e94d06d6ed2042eb060bfd9d366d71b83b203c8fca9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file exhibits characteristics of a link farm, embedding numerous external links. A critical heuristic identified a link to a known malicious redirector, ttraff.cc, which likely serves to obscure the ultimate malicious destination. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=akuntansi+sektor+publik+mardiasmo+pdf', suggesting a lure related to financial documents.

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=akuntansi+sektor+publik+mardiasmo+pdf
    • http://zifudofe.votvsa.org/uploads/1/3/0/7/130738970/1571706.pdf
    • http://files.sanskarsadan.com/uploads/1/3/2/7/132710795/wugekixez_pakimedu.pdf
    • http://files.amythecrittersitter.com/uploads/1/3/1/3/131379594/ziwigusarotuzu.pdf
    • http://files.greatwhytesurfboards.com/uploads/1/3/1/3/131381658/bazogejox-zupat-ditewavedovam-tokirexa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riginijulu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6803/0102/files/motorola_h720_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/82454760887.pdf
    • https://cdn.shopify.com/s/files/1/0437/8542/0949/files/triton_flats_code.pdf
    • https://cdn.shopify.com/s/files/1/0438/1540/3682/files/bobcat_863_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/2930/6263/files/9642019047.pdf
    • https://cdn.shopify.com/s/files/1/0440/0916/0862/files/pdf_catalogo_avon_campagna_16_2020.pdf
    • https://cdn.shopify.com/s/files/1/0438/4351/8629/files/29792352303.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4853/files/zopexezufemorexus.pdf
    • https://cdn.shopify.com/s/files/1/0432/0742/6216/files/tulodafabigimufeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/8080/1701/files/oscillatoria_tenuis.pdf
    • https://cdn.shopify.com/s/files/1/0434/1058/7800/files/design_patterns_explained_simply_java.pdf
    • https://cdn.shopify.com/s/files/1/0437/6982/3383/files/44035871215.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2337/files/wigovavo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1901/0201/files/lejigi.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006381.bin
2ba5bd808cc229ff3338f99d5e8c2be5d817ce4cbee9057a0331c02d4d0b0ff6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6381 5380 bytes
font_01_sfnt_off000075b2.bin
b3b5adca5aed127cf71cc26c1045639bc1ce75a49afdd75303a24449f02627f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75B2 14792 bytes

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