Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd5e21d3d4377df3…

MALICIOUS

PDF

43.1 KB Created: 2020-08-11 13:12:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c1fbc331124ce516bd4d05c1bf8a755 SHA-1: c50a6aeb84bc68eedef15f1bb0da7ae48acc856d SHA-256: cd5e21d3d4377df382ba28b5c9ce27deb4956b7319c59a5de6230fb8f9082ab8
154 Risk Score

Malware Insights

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

The PDF document contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=marriage+certificate+form+gujarati+pdf'. This URL is embedded within the document body, suggesting a social engineering lure to trick users into clicking it. The presence of numerous other links, many hosted on cdn.shopify.com, indicates a link farm strategy. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.com/pify?keyword=marriage+certificate+form+gujarati+pdf
    • http://files.hallsvilleactivities.com/uploads/1/3/1/4/131453084/divud.pdf
    • http://files.thehivespacechicago.com/uploads/1/3/1/4/131453588/labadepujiko-kamowod-xanolereto-xewenudezodimap.pdf
    • http://files.lighterthanairky.com/uploads/1/3/1/3/131398140/46a69686.pdf
    • http://files.scottstewartchemistry.com/uploads/1/3/0/7/130775727/jasazogitiguvadawos.pdf
    • https://cdn.shopify.com/s/files/1/0432/3491/8558/files/47888641650.pdf
    • https://cdn.shopify.com/s/files/1/0431/4926/3004/files/47851813157.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/mivosaji.pdf
    • https://cdn.shopify.com/s/files/1/0433/4796/8149/files/12153048641.pdf
    • https://cdn.shopify.com/s/files/1/0429/1425/0905/files/48224772378.pdf
    • https://cdn.shopify.com/s/files/1/0435/5407/8883/files/jivajafesumitenizadid.pdf
    • https://cdn.shopify.com/s/files/1/0435/8710/9023/files/autoestima_alta_negativa.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/dezalopa.pdf
    • https://cdn.shopify.com/s/files/1/0429/1713/4499/files/asteroids_in_astrology.pdf
    • https://cdn.shopify.com/s/files/1/0435/6718/6079/files/andres_caicedo_calicalabozo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3404/9703/files/16584542570.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d68.bin
d0a591e1876236899a45d740dbdcf648e326695adef70975903afe25b4b32bb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D68 5120 bytes
font_01_sfnt_off00006ee3.bin
6f871f26d7f288790fce9cab0789988bbd0afdac957f62d5433ad0fb5fc87263		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE3 10060 bytes
font_02_sfnt_off0000915f.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x915F 4324 bytes

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