Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcdf901b2786b679…

MALICIOUS

PDF

51.2 KB Created: 2020-08-11 15:54:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1e7e5a0974a8a62b671789a1b3d7819 SHA-1: c761f1523d68e49a4a91bf8ae8d74785972d46d9 SHA-256: fcdf901b2786b6799685c2d150a347c3681f6f389d9500269837025dbc55a611
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=atto+di+notoriet%25C3%25A0+modello+pdf'. Additionally, another critical heuristic indicates a PDF link farm, suggesting a common tactic for SEO poisoning or distributing malicious links. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing its malicious intent.

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.ru/pify?keyword=atto+di+notoriet%25C3%25A0+modello+pdf
    • http://files.entechinspections.com/uploads/1/3/1/0/131070508/ribazivajorilafi.pdf
    • http://files.poterinc.org/uploads/1/3/1/4/131437655/2a03f06.pdf
    • http://files.jamesandthegiantpeachstand.com/uploads/1/3/1/1/131163953/e87c8bac89a21.pdf
    • https://cdn.shopify.com/s/files/1/0437/2345/6661/files/62177144137.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4342/files/54333329518.pdf
    • https://cdn.shopify.com/s/files/1/0432/8436/5468/files/rumusasapukiruwupedore.pdf
    • https://cdn.shopify.com/s/files/1/0435/1954/1416/files/articulaciones_costovertebrales.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/st-_119._1.pdf
    • https://cdn.shopify.com/s/files/1/0434/2664/4125/files/45515736083.pdf
    • https://cdn.shopify.com/s/files/1/0431/0351/8882/files/toxewigujemunipetaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/3033/1047/files/wuxufujewokabe.pdf
    • https://cdn.shopify.com/s/files/1/0432/6083/8050/files/wetekajunofewamexugaxot.pdf
    • https://cdn.shopify.com/s/files/1/0429/6943/2230/files/rtx_2080_drivers.pdf
    • https://cdn.shopify.com/s/files/1/0435/6459/7397/files/60469656756.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_off00008808.bin
1fa5097974517354f6713ef806a9f44239f50538dee59d81a3b7954e14ffcf4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8808 5020 bytes
font_01_sfnt_off00009906.bin
ac6f9de580fe09c86fcd3d1e8c86215b2618d60a971e698438cd4ae707833d02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9906 11316 bytes

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