Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ace888bbff6177…

MALICIOUS

PDF

45.9 KB Created: 2020-08-05 11:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a30aa2e51111c9c95e4b86cd0df8584 SHA-1: 80f7aebc12d935d5211b042fd69e09aee2c9e02a SHA-256: 07ace888bbff61773424bbb03fd2a93dd0b46dc35bee731c7bcfbc1f07ea4028
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 external PDF files hosted on various domains, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=componentes+organicos+del+suelo+pdf'. While no scripts were extracted, the presence of numerous links and the ML classifier's high confidence indicate a malicious intent to redirect users to potentially harmful content.

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=componentes+organicos+del+suelo+pdf
    • http://files.cwmclydachict.com/uploads/1/3/1/4/131483098/zalepedex-turunijawe-voluvijotejo-fusemurijeduf.pdf
    • http://files.rodrigoparejo.com/uploads/1/3/1/4/131438190/wuxapirivimavigomop.pdf
    • http://files.tzilvelis.com/uploads/1/3/0/7/130775084/eda2bfc0d3d9d5f.pdf
    • http://files.magicmudceramics.com/uploads/1/3/0/9/130969003/fuzegikepamilu.pdf
    • http://fibawa.ps165qcomputerlab.com/uploads/1/3/0/8/130874474/zoveri.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/2441/6931/files/fujularasak.pdf
    • https://cdn.shopify.com/s/files/1/0433/3263/2730/files/vivusavezelul.pdf
    • https://cdn.shopify.com/s/files/1/0430/5167/9893/files/sidikovipako.pdf
    • https://cdn.shopify.com/s/files/1/0428/1883/0503/files/viparozomulowujol.pdf
    • https://cdn.shopify.com/s/files/1/0435/1534/7103/files/59226450292.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4432/files/wezogudozadigijojitotu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4619/8683/files/akshaya_lottery_result_today.pdf
    • https://cdn.shopify.com/s/files/1/0432/5143/3627/files/ccsp_certification_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66689816557.pdf
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/xuzazezepudafa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2761/1300/files/64400238540.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007229.bin
07acb13be39d42046dcef5e89f204c7cead8c80b945e64d306a7f8d5fd5cb416		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7229 5380 bytes
font_01_sfnt_off00008453.bin
24802fe9848476fd3b2ac1b159d5bd219bb7f0e89cff7b6b3f5b76af83e521ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8453 11136 bytes

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