Malicious PDF — malware analysis report

Static analysis result for SHA-256 657d5ca4c3b3557b…

MALICIOUS

PDF

40.0 KB Created: 2020-08-04 21:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8374caa1584ac540be12aece173910ed SHA-1: 18445c6aa47f69fdf859ad73ae52d4483794ba0b SHA-256: 657d5ca4c3b3557b1a7e50da34cca6be92d2d297b7e92aff3100f5006b90be34
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure related to a 'Canara bank credit card statement' and includes numerous embedded links, one of which points to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document's primary function appears to be redirecting users to potentially harmful content via the ttraff.cc URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.cc/pify?keyword=canara+bank+credit+card+statement+pdf+password+format
    • http://files.caveofpixels.com/uploads/1/3/1/4/131411896/migafuvu.pdf
    • http://files.toxicsofa.com/uploads/1/3/1/3/131382028/legomiwakim_mugalix_befomupokokuroj.pdf
    • http://files.stmaryscountygardenclub.com/uploads/1/3/2/7/132741382/dusenofifu-jiwupigakedekug.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9322/0758/files/dozisusukalenubov.pdf
    • https://cdn.shopify.com/s/files/1/0432/1896/0545/files/zoboresumasabiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/1512/6692/files/galeleviziwimixavid.pdf
    • https://cdn.shopify.com/s/files/1/0429/0428/9439/files/kaboxuw.pdf
    • https://cdn.shopify.com/s/files/1/0437/0772/8023/files/98749846392.pdf
    • https://cdn.shopify.com/s/files/1/0440/1351/9006/files/58099765010.pdf
    • https://cdn.shopify.com/s/files/1/0433/6818/6015/files/lamamej.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/57414912239.pdf
    • https://cdn.shopify.com/s/files/1/0429/0255/2742/files/74213742336.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19441108854.pdf
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/megowilu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7961/files/wofegadepowapo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7281/4245/files/xuzigemalebujew.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/log4j_xml_examples.pdf
    • https://cdn.shopify.com/s/files/1/0428/1214/5823/files/kotibinaluzisodumotu.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005db2.bin
966d5750611605d62fff9cb65f3d4b6f97998c41d238358940d446e5f38832f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB2 5472 bytes
font_01_sfnt_off00007042.bin
634482f1713ce339c4ece3fe6b67fc18620a0d6f82e30f837916a77cba0bc25f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7042 9992 bytes

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