Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bdbb7bcb68cc631…

MALICIOUS

PDF

40.8 KB Created: 2020-08-28 00:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34fbd0a57801a0b220616afc8c02dec6 SHA-1: 5dcc743f572a872c7372580791f76c2060e759c5 SHA-256: 7bdbb7bcb68cc6315d9b7d0fe0988bbcbb9dcc87e318e6bfe797735f54949871
92 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://ttraff.ru/pify?keyword=leaf+storm+gabriel+garcia+marquez+pd'. This URL is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, also contains the same redirector URL, reinforcing its role in the attack. The file is likely used as a lure to redirect users to a malicious site.

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.
  • 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=leaf+storm+gabriel+garcia+marquez+pd
    • http://nirodijor.itechteachers.com/uploads/1/3/0/9/130969204/0b808edae.pdf
    • http://fulorexo.succeedatcic.org/uploads/1/3/2/6/132681670/b7b204.pdf
    • https://cdn.shopify.com/s/files/1/0434/8608/5277/files/jugotegamijapobagexi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0675/4970/files/fulavezimabusozatanifil.pdf
    • https://cdn.shopify.com/s/files/1/0440/3871/7605/files/pimiwerezezifixep.pdf
    • https://cdn.shopify.com/s/files/1/0439/0774/3899/files/zukadajimaramirikiji.pdf
    • https://cdn.shopify.com/s/files/1/0430/8166/2628/files/gufaxadiduwifonu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8136/7701/files/93349285387.pdf
    • https://cdn.shopify.com/s/files/1/0430/4230/8250/files/64609850486.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060d5.bin
c548bdbb4876924841bb7dd055e316f562e2200d6a4821a76e67058e6bc9d4b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60D5 5732 bytes
font_01_sfnt_off0000743e.bin
cf5f4a75005120a9ed19c2a75b032900e49e4d47ff52e6771f2aa1729adcae38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x743E 10092 bytes

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