Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3fb0c4fc3af93a1…

MALICIOUS

PDF

42.9 KB Created: 2020-08-19 04:58:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79d83e8a5a62949707a946c2eb3e30e3 SHA-1: 4073e82ee315232c63d36ec12b333af7c5c67383 SHA-256: a3fb0c4fc3af93a1e463151021713e280afc843ba24ddf4f089cdc36d7e918db
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, also contains the URL 'https://ttraff.ru/pify?keyword=framing+agenda+setting+and+priming+pdf', which is flagged as malicious. The presence of a link farm heuristic further suggests an attempt to distribute malicious content or engage in SEO poisoning. No scripts were extracted from this sample.

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.ru/pify?keyword=framing+agenda+setting+and+priming+pdf
    • http://pufam.evansms.com/uploads/1/3/1/6/131607712/483764cd.pdf
    • http://files.michiganskymedia.com/uploads/1/3/0/7/130775784/memowi_ripofo_xusulemales.pdf
    • http://files.zfamilyenterprises.com/uploads/1/3/2/3/132302733/7499779.pdf
    • http://zuzanido.cleanfreshbeauty.com/uploads/1/3/2/3/132302936/5347666.pdf
    • http://files.krwoodworkings.com/uploads/1/3/1/8/131871894/1591208.pdf
    • https://cdn.shopify.com/s/files/1/0431/3851/5095/files/zotaketuxelaxel.pdf
    • https://cdn.shopify.com/s/files/1/0432/0460/8155/files/tirilinedizamaliputewizof.pdf
    • https://cdn.shopify.com/s/files/1/0437/9587/3949/files/foxit_reader_for_android_apk.pdf
    • https://cdn.shopify.com/s/files/1/0436/2108/9444/files/energia_hidraulica_libros.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gaxedisurerikemamezawapux.pdf
    • https://cdn.shopify.com/s/files/1/0432/2436/7262/files/duzulegosebiwolo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4705/0661/files/vibugivu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/28203952682.pdf
    • https://cdn.shopify.com/s/files/1/0427/3651/7286/files/tifisopa.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/deezloader_remix_download.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_off00006a90.bin
2c20d84151b8680daa1d7e06a42b734e82e84d152fb79daef8cc04c55f54efb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A90 5284 bytes
font_01_sfnt_off00007c74.bin
f819395cbf57cb453a915ba1129ba7eccb1d5779d90a51891ab374f9d93b084c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C74 10064 bytes

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