Malicious PDF — malware analysis report

Static analysis result for SHA-256 3548170e46c24228…

MALICIOUS

PDF

56.6 KB Created: 2020-08-12 20:10:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c726af08cf3c55a47c24e948b4f31665 SHA-1: 84550bac91f00fc89e3a25c4481c76af82b916f2 SHA-256: 3548170e46c24228be09e0bc2eef421d00361ad9b2225acc02043f1ab5021053
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru', which is also present in the document body. Additional heuristics indicate a PDF link farm, suggesting SEO manipulation or a phishing lure. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves redirecting users to potentially harmful external sites.

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/wb?keyword=menopausia%20pdf%20colombia
    • http://julojum.kenreadsjyotish.com/uploads/1/3/2/7/132710712/11ee30.pdf
    • http://wivuse.rustonpartygalaxy.com/uploads/1/3/2/7/132740362/zapamedujuwe.pdf
    • http://files.laaljaba.org/uploads/1/3/0/7/130776619/ligulofiwowixakepaxi.pdf
    • https://cdn.shopify.c
    • https://cdn.shopify.com/s/files/1/0435/7872/0414/files/bowov.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6341/files/41008012039.pdf
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/jakelabanawowaranewapase.pdf
    • https://cdn.shopify.com/s/files/1/0449/5812/2139/files/pdf_arcadismo_no_brasil.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/fanenegawovazilazomakaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9385/files/4200953274.pdf
    • https://cdn.shopify.com/s/files/1/0434/5665/9621/files/61991852204.pdf
    • https://cdn.shopify.com/s/files/1/0435/3998/8648/files/expert_ielts_band_7._5.pdf
    • https://cdn.shopify.com/s/files/1/0431/6538/4866/files/49232836543.pdf
    • https://cdn.shopify.com/s/files/1/0433/8581/5194/files/lil_wayne_lollipop_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/51191469754.pdf
    • https://cdn.shopify.com/s/files/1/0438/3693/2253/files/fufuzufodiwixevedexuzudat.pdf
    • https://cdn.shopify.com/s/files/1/0429/2640/7833/files/fajaxogamu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/learning_spanish_language_download.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_off00009bf2.bin
dfa5bf420d772cc24da5f06f5875abab518bd55c323c55d69f8518bb350dc5eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BF2 5348 bytes
font_01_sfnt_off0000ae0e.bin
c75e7d9568dc608cb7d6164fb9cea072a040c8953f15c6b50c2acc1b4d8ed2da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE0E 11616 bytes

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