Malicious PDF — malware analysis report

Static analysis result for SHA-256 114877d6774d3f7f…

MALICIOUS

PDF

81.9 KB Created: 2020-08-23 12:03:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f8d87f3e4892a7f957bb738b892de72 SHA-1: 4e8b3fa9dc2a456f3cdec780b30f1285f45d98ee SHA-256: 114877d6774d3f7fd562221f44fe98366df1bc842a883d86d2178ecb67119440
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF contains numerous embedded links, many of which point to a link farm designed to distribute malicious content. One critical heuristic identified a link to a known malicious redirector, https://ttraff.cc/pify?keyword=cg+movies+2019, which is likely intended to lead the user to a phishing or malware download site. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=cg+movies+2019
    • http://files.trinityclaremont.org/uploads/1/3/2/6/132681144/e5220a85.pdf
    • http://kikijes.x-btc.com/uploads/1/3/0/8/130814328/9424798.pdf
    • http://jugad.stitchedwithcare.com/uploads/1/3/1/4/131453645/wokoned.pdf
    • http://files.portalresearch.org/uploads/1/3/1/3/131380600/zozimosutevazux_sipusupofegez_vugenusilofakov.pdf
    • http://www.opentle.org
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9388/5089/files/ashville_college_harrogate_uniform.pdf
    • https://cdn.shopify.com/s/files/1/0431/0564/8791/files/94220932899.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2033782386.pdf
    • https://cdn.shopify.com/s/files/1/0437/8309/4434/files/aristoteles_organon.pdf
    • https://cdn.shopify.com/s/files/1/0437/8322/5506/files/79841204831.pdf
    • https://cdn.shopify.com/s/files/1/0433/5101/5579/files/glutaric_aciduria_type_2.pdf
    • https://cdn.shopify.com/s/files/1/0430/4017/8333/files/1985_honda_shadow_500.pdf
    • https://cdn.shopify.com/s/files/1/0433/4967/2091/files/gadojezesanebedus.pdf
    • https://cdn.shopify.com/s/files/1/0437/6847/9893/files/79597013926.pdf
    • https://cdn.shopify.com/s/files/1/0430/3765/5193/files/32547860381.pdf
    • https://cdn.shopify.com/s/files/1/0431/3645/0717/files/materiales_dentales_macchi_4_edicion.pdf
    • https://cdn.shopify.com/s/files/1/0431/4166/0826/files/rasewisixe.pdf
    • https://cdn.shopify.com/s/files/1/0437/8771/4721/files/42618869492.pdf
    • https://cdn.shopify.com/s/files/1/0434/9041/0658/files/rezetek.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31670740491.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://www.gnu.org/licenses/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000f772.bin
7f8a74c5c2a7310b57ca52450526c3d6a32214ce556dbc08d619ae56c157eefb		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF772 9680 bytes
font_00_sfnt_off0000aad5.bin
bb1b25ff392ea5ea15c3cb2b53f51d84039774cdd511b3952658a1d429754944		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAD5 18408 bytes
font_01_sfnt_off0000e60a.bin
96e960bafcc260112ccddfa1f11970df7e389527315811135df4f3b5d1b73947		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE60A 5112 bytes
font_03_sfnt_off0001125f.bin
e4bf1c7d274abb6d739e4f5104bcd6603c72563a952353340f9e4f7b4ba2e215		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1125F 11640 bytes

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