Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3b0c48e228da2c2…

MALICIOUS

PDF

44.1 KB Created: 2020-08-14 01:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eaeb57acb7a2fdd1578b9a0c211a1624 SHA-1: 6f5a7117b7ecf900dd05891c7f63d48547ae3689 SHA-256: f3b0c48e228da2c2d41799bc00637200e8d56f5df258b57c5cb2e5adef464860
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and text suggesting a lure for a 'change pdf file to jpg free' tool. This indicates a phishing attempt to redirect users to malicious infrastructure. The presence of numerous Shopify links, while mostly benign, suggests an attempt to blend in with legitimate content or potentially abuse these platforms for hosting.

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=change+pdf+file+to+jpg+free
    • http://ragabafit.cymru.tycymorth.org.uk/uploads/1/3/2/6/132682076/xiwolo.pdf
    • http://bixokijuv.meadowbrookwellness.com/uploads/1/3/1/4/131409090/kivajevapuputineke.pdf
    • http://files.hwah.ca/uploads/1/3/2/6/132681482/6419870.pdf
    • http://sukilev.christinamarshalllmt.com/uploads/1/3/0/9/130969352/sepetebexotud.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fiwowosilikaragufes.pdf
    • https://cdn.shopify.com/s/files/1/0435/1649/3976/files/59151542720.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0422/files/96047434719.pdf
    • https://cdn.shopify.com/s/files/1/0439/4034/8059/files/sigofito.pdf
    • https://cdn.shopify.com/s/files/1/0438/5020/3296/files/depaloxajerotevojo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6529/5526/files/annihilation_of_caste_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/1197/8902/files/algebra_6th_grade_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/3323/0488/files/xifopoxigujibunaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/dezasufixe.pdf
    • https://cdn.shopify.com/s/files/1/0434/1946/7943/files/26657960461.pdf
    • https://cdn.shopify.com/s/files/1/0437/5488/1175/files/risk_management_plan_clinical_trials_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/96869898010.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_off000061f9.bin
b95e5a55ec6d842898a80bb7b8be2687e5263ea4f5514a74fef7bedcdc1fc887		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61F9 5012 bytes
font_01_sfnt_off000072fd.bin
01dbe95b27a0530d453d717d56e0be89423147a7bfdc2c2f96c895b2a59a6753		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72FD 10104 bytes
font_02_sfnt_off00009588.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9588 4324 bytes

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