Malicious PDF — malware analysis report

Static analysis result for SHA-256 41e5a09fda835094…

MALICIOUS

PDF

51.9 KB Created: 2020-07-30 15:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84bfb859f2bb6407851676bac1f63bbe SHA-1: eefc705239eab950000d9f053e7370cb6b21cef0 SHA-256: 41e5a09fda835094092f0a974889447769b7fe8f7acc55330aa6ecbe7cd15bf0
128 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final destination of the malicious payload. The presence of a 'download button' heuristic and numerous embedded links suggests a social engineering attempt to trick the user into downloading further malware. The document body is heavily obfuscated and does not provide clear textual lures.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=abbyy+gz+to+pdf
    • http://files.royaloakschoolsfoundation.org/uploads/1/3/1/4/131454270/bijefasoba.pdf
    • http://files.westernkyelite.com/uploads/1/3/0/8/130873921/79599ae5a.pdf
    • http://files.saiddeek.com/uploads/1/3/1/4/131438459/ef62a09fdef61.pdf
    • http://files.mysecondhandrose.com/uploads/1/3/1/4/131437535/935886e414b3.pdf
    • https://cdn.shopify.com/s/files/1/0428/4389/8019/files/xepatolej.pdf
    • https://cdn.shopify.com/s/files/1/0438/5538/0630/files/5723346205.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6757/files/dasasotirepenefefavamuxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5235/1144/files/tepuxugexed.pdf
    • https://cdn.shopify.com/s/files/1/0440/7833/4117/files/54990772598.pdf
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/22636937640.pdf
    • https://cdn.shopify.com/s/files/1/0434/7396/1110/files/zodeputuvawobol.pdf
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/40526734820.pdf
    • https://cdn.shopify.com/s/files/1/0439/7747/4206/files/zazepesuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/2174/6847/files/waruvup.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/doxajowewuwamigutak.pdf
    • https://cdn.shopify.com/s/files/1/0434/4302/8120/files/39602484099.pdf
    • https://cdn.shopify.com/s/files/1/0434/5049/9222/files/wopawutizigaverobepibux.pdf
    • https://cdn.shopify.com/s/files/1/0435/8491/3563/files/jijonojepe.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/
    • https://cdn.shopify.com/s/fi

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off000083f6.bin
8805024f202eaed841a0899b21cf17ac3592f2d03622f108fa3be5704ea71739
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x83F6 9040 bytes
font_00_sfnt_off000074a6.bin
b819ecb93448bcb8a2e236f6779b10674e45ccce7ca2dcad672552dbb665bd94
pdf-font-stream PDF embedded font (sfnt) at offset 0x74A6 4492 bytes
font_02_sfnt_off00009cfb.bin
4237f94e14aad951f048ae3b4bac7c18899bb4dc3dbade11edcc90780cad9ff4
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CFB 10284 bytes