Malicious PDF — malware analysis report

Static analysis result for SHA-256 69da1de1417e4773…

MALICIOUS

PDF

40.5 KB Created: 2020-08-25 20:28:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f6c842b8a19d5a59d589cb64c0dbdd7 SHA-1: a72785a183373b8d4ceed227d89e70cb9d6af463 SHA-256: 69da1de1417e47730cd29c4fe5207dcadba7189d8983cb4ed3b29aad5f99c2c4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document also contains a large number of external PDF links, suggesting a link farm for SEO manipulation or to distribute malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector.

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=how+to+print+with+ipad
    • http://files.numinousjane.com/uploads/1/3/2/6/132681409/b75e6438cfd52.pdf
    • http://files.bliss-worx.com/uploads/1/3/1/4/131452735/5083761.pdf
    • http://files.majortac.com/uploads/1/3/1/6/131636834/besilebu_dojepun_fawidigagorere.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/2749/5069/files/adultery_judgement_supreme_court.pdf
    • https://cdn.shopify.com/s/files/1/0429/2942/2499/files/4th_grade_addition_word_problems.pdf
    • https://cdn.shopify.com/s/files/1/0431/0014/3770/files/epigenetica_y_nutricion.pdf
    • https://cdn.shopify.com/s/files/1/0429/4646/1852/files/mifubad.pdf
    • https://cdn.shopify.com/s/files/1/0431/4192/2977/files/sedenorogigororabakol.pdf
    • https://cdn.shopify.com/s/files/1/0430/3604/9571/files/13571762050.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/calcul_amortissement_linaire.pdf
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/9695702500.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/bewaxuletaxedipu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0266/6906/files/13978428197.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_off00006222.bin
7481792b083a17bcd9bb71c1d8d9d1042cbd7a9b76ea9deca864c1cc5085dc8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6222 4892 bytes
font_01_sfnt_off000072c3.bin
46293aa350a3dc342f684b182029bdcbe0d8ca11df45d7ecc115ef61549196b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x72C3 10280 bytes