Malicious PDF — malware analysis report

Static analysis result for SHA-256 297ee2a08ce1ce80…

MALICIOUS

PDF

52.4 KB Created: 2020-08-10 06:10:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: debeac0c8d791a56d8d87c32ae5e8702 SHA-1: 420af46f630fc2990ac1dd68c33a21bde3e560a2 SHA-256: 297ee2a08ce1ce80b5c916a435d9840072629e16f75442202b69eaa006c2ba55
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to SEO-optimized PDF files, a common tactic for link farms and SEO poisoning. One prominent link, 'https://ttraff.ru/pify?keyword=beauty+and+the+beast+piano+sheet+music+easy+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect users to malicious infrastructure under the guise of providing sheet music.

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=beauty+and+the+beast+piano+sheet+music+easy+pdf
    • http://muxof.quickfiretalent.com/uploads/1/3/1/4/131453060/jenem-donegekame-farakafivaz-pinusaxasi.pdf
    • http://files.wsfishfarm.com/uploads/1/3/1/3/131398406/57b709129.pdf
    • http://files.digitalcaricatureartists.com/uploads/1/3/1/4/131452958/7898806.pdf
    • http://nadegi.shipleyartstudio.org/uploads/1/3/1/0/131070767/donebi.pdf
    • http://files.clevelandrelationshiptherapy.com/uploads/1/3/1/6/131637055/7236295.pdf
    • https://cdn.shopify.com/s/files/1/0437/3282/8314/files/sadolafevagebo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/30818979582.pdf
    • https://cdn.shopify.com/s/files/1/0437/5976/3617/files/oxford_phonetic_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0437/3417/1800/files/dark_souls_3_farron_keep_map.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gofusibosaduxigagixuvoma.pdf
    • https://cdn.shopify.com/s/files/1/0437/1546/1275/files/tabulowiduxazipeduxugiza.pdf
    • https://cdn.shopify.com/s/files/1/0438/5269/3654/files/10854171004.pdf
    • https://cdn.shopify.com/s/files/1/0437/7015/1061/files/tefujutubevewe.pdf
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/lutarigonegenobesubozora.pdf
    • https://cdn.shopify.com/s/files/1/0428/2328/6940/files/23610616739.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3357/files/jedibunojube.pdf
    • https://cdn.shopify.com/s/files/1/0435/4070/9527/files/nissan_owner_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/3100/1238/files/yayati_kadambari_marathi.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_off000079a0.bin
ffc0a34fd44b050b989ed2e3fbf85c7a09f17c57fa617bc58334ee43d5e8c396		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79A0 5560 bytes
font_01_sfnt_off00008c6d.bin
115521dc2ff67448d609302786a361b702df331b4cd544cda7550032894c3f58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C6D 9860 bytes
font_02_sfnt_off0000ae72.bin
b330339415d7fa9c1b652c1fb2a052ec06569061b7b71506ab53161dc9b94742		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE72 16100 bytes

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