Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4de08d6090eeb0c…

MALICIOUS

PDF

62.3 KB Created: 2020-09-19 02:40:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 51236ce8df67103a61aae236a623d18f SHA-1: aa2d23d4cc5589b6701805c464997b4d2783d007 SHA-256: f4de08d6090eeb0c2e20d3349f993ed362bd1f1fab25d291567dc0996a6d0b6c
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, many of which point to external PDF documents. One of these links, https://ttraff.club/wix?keyword=hospital+infection+control+manual+aiims, is known to redirect to malicious infrastructure. The document's structure and the presence of numerous links suggest it is designed to lure users to potentially harmful content, likely as part of a phishing or content-farming scheme.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.club/wix?keyword=hospital+infection+control+manual+aiims In PDF document text
    • http://dofebemap.sporcktileart.com/uploads/1/3/0/7/130738993/datoselexi.pdfIn PDF document text
    • http://xufax.epiliftau.com/uploads/1/3/2/6/132681426/zubevizukiwog.pdfIn PDF document text
    • http://files.scs99.com/uploads/1/3/1/0/131070971/9511929.pdfIn PDF document text
    • http://files.creativedecolonization.org/uploads/1/3/0/7/130738720/linepemevokisegip.pdfIn PDF document text
    • http://files.patakai.co.nz/uploads/1/3/1/4/131455475/a19aec2f6cd.pdfIn PDF document text
    • http://vobedikun.12gaugemicrophones.com/uploads/1/3/0/9/130969045/nimawulefov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://348a96fc-5dfd-40a1-9035-a742281d09a6.filesusr.com/ugd/2074c9_d9f58466ac29411da785cd03209218c8.pdf?index=trueIn PDF document text
    • https://6ba8902b-6fbd-48eb-89ea-c3162525b01a.filesusr.com/ugd/956c05_b7313608ebdf4784aa01c44f1f68cfc6.pdf?index=trueIn PDF document text
    • https://2b8e1504-cc84-4a94-acf5-835e6c3aba84.filesusr.com/ugd/1b9faa_0b4f9f007dcd4cb4998de52f7040119b.pdf?index=trueIn PDF document text
    • https://41fd14e6-87e1-4175-bfbc-6102ee2bac73.filesusr.com/ugd/97368a_576cc3fbf81542bbac2d6e4c61323826.pdf?index=trueIn PDF document text
    • https://9f9261df-82d2-4a4e-9eb2-9a32f5e3f1f7.filesusr.com/ugd/c67d0c_311ec81bf33d464681860ee133ebf64b.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/8344/8730/files/darksiders_ps4_trophy_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3584/5017/files/roxilo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8094/9658/files/71720696333.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B72 5124 bytes
SHA-256: 5edbba6c9c1dd05600dda9373a05710c767ce20f4c0878b3a0b651fa02bfe038
font_01_sfnt_off00009cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CC5 15164 bytes
SHA-256: 44d27378f82bc8d911dd7b659fae7707f3a742de0df9a22043d227eceed2de1a
font_02_sfnt_off0000cb88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB88 9364 bytes
SHA-256: 610d0d3b9c089c984de3184c14543d6adae7ef7dc464e7b4383cf5f287e7ad11

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