Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6c65aafd588442a…

MALICIOUS

PDF

49.8 KB Created: 2020-08-11 20:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12c85045f2cbb3a13cd864b15d357d35 SHA-1: cd62706f4d757d4034a207e9b0dbdf260ebd1290 SHA-256: e6c65aafd588442af61867de4892e369b6b1d014ab42ea711a13273de0632493
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=bastards+of+istanbul+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The presence of many Shopify-hosted links, some flagged as benign, likely serves to obscure the malicious redirector within a larger link farm.

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/pify?keyword=bastards+of+istanbul+pdf
    • http://files.aerofamilyhealth.com/uploads/1/3/0/7/130776326/47eadbb3fb.pdf
    • http://files.ketsanafoundation.com/uploads/1/3/0/7/130740444/1078333.pdf
    • http://zinix.smokywaxcompany.com/uploads/1/3/1/3/131383309/854e010.pdf
    • https://cdn.shopify.com/s/files/1/0430/6668/7642/files/pisixosiwazosaxiwuxofom.pdf
    • https://cdn.shopify.com/s/files/1/0430/7373/2768/files/fetch_api_post.pdf
    • https://cdn.shopify.com/s/files/1/0431/7904/9121/files/english_to_urdu_oxford_dictionary_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/0017/4504/files/57754548896.pdf
    • https://cdn.shopify.com/s/files/1/0440/0968/5157/files/34946341491.pdf
    • https://cdn.shopify.com/s/files/1/0429/5501/4298/files/pipafemututovuzu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/kayla_itsines_bbg_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6936/files/advanced_excel_vba_codes.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/wofujonetewugomexirek.pdf
    • https://cdn.shopify.com/s/files/1/0434/3418/0769/files/73576198929.pdf
    • https://cdn.shopify.com/s/files/1/0429/6248/5407/files/bazipopov.pdf
    • https://cdn.shopify.com/s/files/1/0437/8702/6590/files/19175628785.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006642.bin
bf55aa2dc9b978919e4bc56b4f8a122687b34a0aed956e5206f532f8efa1b1cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6642 5224 bytes
font_01_sfnt_off00007802.bin
2004737e9cb5bd6c41cd7211ba2e34ff0b8bad68f7a317f063781af54f088c1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7802 9920 bytes
font_02_sfnt_off00009a2f.bin
532ccd02a76cd8580cc2260e268600934ffa1b7526b52bb628a4cdf96a9e1c27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A2F 19504 bytes

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