Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1f56e2eb3f958a4…

MALICIOUS

PDF

38.8 KB Created: 2020-08-28 09:12:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba9e83314c4b1f031f913c84d1ac11f3 SHA-1: 46454224cf5aa8477ad9ce87ba3530ce09dddb0b SHA-256: d1f56e2eb3f958a42b3c620d3a9bb70ad5a6cc69f1001b9751b1fd5ce22b362d
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a common tactic for SEO poisoning and phishing campaigns. One critical heuristic firing indicates a malicious redirector link to 'ttraff.club', which is likely the primary malicious destination. The document body, though partially corrupted, contains the title 'Las cuatro después de medianoche' and the same malicious URL, suggesting a lure to a malicious site disguised as a document. The presence of numerous benign Shopify links is likely an attempt to blend in and reduce suspicion.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.club/pify?keyword=las+cuatro+despu%25C3%25A9s+de+medianoche
    • http://files.cambridgeballetclub.co.uk/uploads/1/3/1/6/131636995/e0fe1f65d.pdf
    • https://cdn.shopify.com/s/files/1/0433/6353/2951/files/34098656288.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gabagijujusudizal.pdf
    • https://cdn.shopify.com/s/files/1/0429/3656/5923/files/numeros_de_tres_cifras_ejemplos.pdf
    • https://cdn.shopify.com/s/files/1/0440/1361/7302/files/adobe_audition_1._5_setup.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84574839703.pdf
    • https://cdn.shopify.com/s/files/1/0434/5312/0679/files/product_positioning_strategy.pdf
    • https://cdn.shopify.com/s/files/1/0439/4647/5678/files/kawakawa_bay_rock_climbing_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/free_fillable_w-_9.pdf
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/wobakivejudebadolese.pdf
    • https://cdn.shopify.com/s/files/1/0431/0453/4692/files/whatsapp_apk_for_iphone_5c.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_off00004a79.bin
716bcdb8e15884e8111a51d604ed978eefbca8cff4e9f166cf5e2a0f9f9c0e02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A79 5248 bytes
font_01_sfnt_off00005bce.bin
941f3019d7f3338e4bf21d0d16a7881c1894bed1c8dfe3c9d58e6ba0af523424		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BCE 10640 bytes
font_02_sfnt_off00007e8d.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8D 4324 bytes

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