Malicious PDF — malware analysis report

Static analysis result for SHA-256 377afddc9bd288e6…

MALICIOUS

PDF

39.9 KB Created: 2020-08-10 09:31:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 423707da8b5d4139186bf3140a412de3 SHA-1: 9c58c31768a0e166d79e1817972d00b63a6ea5fa SHA-256: 377afddc9bd288e6b0a00ce7c678ac8529d30a24e68f642db358d4557efb51ea
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing indicating a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=macrocytic+anemia+pdf' which is likely used to direct users to malicious content. The presence of numerous other PDF links suggests a link farm or a broad distribution attempt, characteristic of phishing or scam campaigns.

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=macrocytic+anemia+pdf
    • http://files.nigerianwriters.info/uploads/1/3/0/7/130775011/tonasov.pdf
    • http://kipotazo.fredoniapubliclibrary.com/uploads/1/3/1/3/131380213/7144526.pdf
    • http://babagokug.jamiejirout.com/uploads/1/3/2/6/132695569/639ca058aa.pdf
    • https://cdn.shopify.com/s/files/1/0438/1615/7344/files/pptidos_y_enlace_peptdico.pdf
    • https://cdn.shopify.com/s/files/1/0432/9547/3822/files/najajiwelatikixiravanitob.pdf
    • https://cdn.shopify.com/s/files/1/0435/5004/8420/files/kexosakapejelomitixase.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8769/files/7._1._5_patch_notes_class_changes.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/lalalitiviwutugepufeleg.pdf
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/29764167727.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/79183481914.pdf
    • https://cdn.shopify.com/s/files/1/0431/6584/3620/files/artikel_tentang_bahaya_narkoba.pdf
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/baramati_taluka_map.pdf
    • https://cdn.shopify.com/s/files/1/0430/1373/4563/files/24041507374.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_off00005f23.bin
8932a67879658730d3c95f556a39225e7487bed29eedba7577313c2148c87c0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F23 5200 bytes
font_01_sfnt_off000070d7.bin
4a127aa439a77bfc9ce8be6ec0f06285ed3752249ea3e694691ff9a98ad9270f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70D7 10092 bytes

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