Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba3be972f47e675…

MALICIOUS

PDF

50.4 KB Created: 2020-08-18 23:09:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddac6a86fb789548bc69617fcfaed191 SHA-1: 760eeb9c60f34e3daa7f03c49b37b37bbdcae0e8 SHA-256: 5ba3be972f47e675749f6b5c766f7181cf658ec20513090531d782e0dc82cbc9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document also contains a large number of links to various PDF files hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

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=allocated+tips+report
    • http://files.expansionphotography.com/uploads/1/3/0/9/130969700/5688fedaab.pdf
    • http://surujaja.micheleroldanshaw.com/uploads/1/3/1/0/131070450/5371594.pdf
    • http://xazura.nplwest.com/uploads/1/3/0/8/130814328/fizotoxizonuse.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/3769/5906/files/brooker_biology_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/49233009978.pdf
    • https://cdn.shopify.com/s/files/1/0437/1814/8247/files/22532109500.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65925238695.pdf
    • https://cdn.shopify.com/s/files/1/0433/2768/4760/files/xapiwogamusij.pdf
    • https://cdn.shopify.com/s/files/1/0429/2096/8358/files/phn_mm_chuyn_sang_jpg_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/tivozovozuretidipabej.pdf
    • https://cdn.shopify.com/s/files/1/0432/0837/6482/files/99609381562.pdf
    • https://cdn.shopify.com/s/files/1/0428/6880/1702/files/kabali_song_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/nobody_greater_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0428/5045/1623/files/xijufituwazepi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a1f.bin
5df0a830e3a65a4f1a38ceb5ee6782ac57e5ce3d453c2a25347b9d1873dbf8bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1F 4740 bytes
font_01_sfnt_off00008a3c.bin
c14385a871309c46cf04adc5515c950fa719d143198fcdfe4ab21e71ac4e522b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3C 11120 bytes
font_02_sfnt_off0000aef9.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEF9 4324 bytes

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