Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a89f52b754f82b1…

MALICIOUS

PDF

47.7 KB Created: 2020-08-06 16:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d09ab54d26e64fdd342b8fbdede2841e SHA-1: f19cd4f6c00da69c9c48962564da6b1b83067b76 SHA-256: 3a89f52b754f82b113e5889eef2fcebfc1e0b4d2e3a1b98f0f61fabf07d93066
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.com/pify?keyword=business+communication+notes+for+b.+com+1st+sem+pdf'. This suggests the document is designed to lure users to malicious sites, likely for phishing or malware distribution. The ML classifier strongly supports the malicious nature of this PDF.

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=business+communication+notes+for+b.+com+1st+sem+pdf
    • http://files.johnsalozzoart.com/uploads/1/3/2/6/132681836/jorazavud.pdf
    • http://files.christierecords.in/uploads/1/3/2/6/132696274/1596304.pdf
    • http://ganej.girlfridayyarn.com/uploads/1/3/2/6/132682646/nakozupubufutiroje.pdf
    • http://files.aurorataichichuan.com/uploads/1/3/1/6/131606198/8a6f4f5e.pdf
    • https://cdn.shopify.com/s/files/1/0432/1070/3010/files/angular_q_all.pdf
    • https://cdn.shopify.com/s/files/1/0433/7703/3372/files/emergency_assembly_point.pdf
    • https://cdn.shopify.com/s/files/1/0451/0354/6533/files/business_model_canvas_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0428/5012/3943/files/joxobogizulol.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4266/files/jeravapujufekelok.pdf
    • https://cdn.shopify.com/s/files/1/0431/2137/7434/files/25108746128.pdf
    • https://cdn.shopify.com/s/files/1/0431/8933/8276/files/29004470998.pdf
    • https://cdn.shopify.com/s/files/1/0427/7967/2735/files/11199741671.pdf
    • https://cdn.shopify.com/s/files/1/0432/8642/9861/files/99902224807.pdf
    • https://cdn.shopify.com/s/files/1/0433/8565/1358/files/kurs_angielskiego_dla_pocztkujcych.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/foxumijezapulupefipifa.pdf
    • https://cdn.shopify.com/s/files/1/0439/8107/8686/files/70915584767.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c17.bin
048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C17 6744 bytes
font_01_sfnt_off00006cfc.bin
e91662fb42d2d6a1839f9907c4da215a945fd95d11b17041300e1df4a2831b87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFC 5424 bytes
font_02_sfnt_off00007f4c.bin
0ec60137cc962365a95e64dda921ea7aa36cc9df51cafaa28817e86281629fde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4C 10488 bytes
font_03_sfnt_off0000a316.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA316 4324 bytes

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